UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-07354
 
Name of Fund: BlackRock Investment Quality Municipal Trust, Inc. (BKN)
 
Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Donald C. Burke, Chief Executive Officer, BlackRock Investment Quality Municipal Trust, Inc., 800 Scudders Mill Road, Plainsboro, NJ, 08536. Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 10/31/2008

Date of reporting period: 11/01/2007 – 01/31/2008

Item 1 – Schedule of Investments

BlackRock Investment Quality Municipal Trust    
Schedule of Investments as of January 31, 2008 (Unaudited)  
(in Thousands)
    Face        
State   Amount   Municipal Bonds  
Value
Alabama - 7.6% $ 1,765   Birmingham, Alabama, Special Care Facilities Financing Authority, Revenue Refunding Bonds    
        (Ascension Health Credit), Series C-2, 5% due 11/15/2036 $ 1,781
    1,265   Birmingham, Alabama, Special Care Facilities Financing Authority, Revenue Refunding Bonds    
        (Ascension Health Credit), Series C-2, 5% due 11/15/2039   1,275
    14,000   University of Alabama, Hospital Revenue Bonds, Series A, 5.875% due 9/01/2010 (i)(j)   15,364
Arizona - 4.5%   3,990   Salt Verde Financial Corporation, Arizona, Senior Gas Revenue Bonds, 5% due 12/01/2032   3,716
    5,585   Salt Verde Financial Corporation, Arizona, Senior Gas Revenue Bonds, 5% due 12/01/2037   5,132
    490   San Luis, Arizona, Facilities Development Corporation, Senior Lien Revenue Bonds    
        (Regional Detention Center Project), 6.25% due 5/01/2015   477
    490   San Luis, Arizona, Facilities Development Corporation, Senior Lien Revenue Bonds    
        (Regional Detention Center Project), 7% due 5/01/2020   470
    980   San Luis, Arizona, Facilities Development Corporation, Senior Lien Revenue Bonds    
        (Regional Detention Center Project), 7.25% due 5/01/2027   938
California - 19.3%   1,340   California County Tobacco Securitization Agency, Tobacco Revenue Bonds (Stanislaus County Tobacco Funding    
        Corporation), Sub-Series B, 5.875% due 6/01/2046 (o)   92
    7,090   California County Tobacco Securitization Agency, Tobacco Revenue Bonds (Stanislaus County Tobacco Funding    
        Corporation), Sub-Series C, 6.30% due 6/01/2055 (o)   211
    9,060   California County Tobacco Securitization Agency, Tobacco Revenue Bonds (Stanislaus County Tobacco Funding    
        Corporation), Sub-Series D, 7.251% due 6/01/2055 (o)   214
    10,000   California State, GO, 5% due 3/01/2033 (n)   10,221
    1,595   California State, GO, Refunding, 5.625% due 5/01/2010 (j)   1,727
    290   California State, GO, Refunding, 5.625% due 5/01/2018   310
    5,800   California State, GO, Refunding, 5% due 2/01/2032   5,821
    4,545   California State, GO, Refunding, 5% due 6/01/2032   4,567
    3,485   California State, GO, Refunding, 5% due 6/01/2034   3,493
    7,000   Foothill/Eastern Corridor Agency, California, Toll Road Revenue Refunding Bonds, 5.56% due 1/15/2028 (o)   6,564
    3,495   Foothill/Eastern Corridor Agency, California, Toll Road Revenue Refunding Bonds, 5.75% due 1/15/2040   3,523
    805   Golden State Tobacco Securitization Corporation of California, Tobacco Settlement Revenue Refunding Bonds,    
        Senior Series A-1, 5.125% due 6/01/2047   696
    10,945   Los Altos, California, School District, GO (Election of 1998), Series B, 5.93% due 8/01/2013 (i)(j)(o)   4,986
    4,185   University of California Revenue Bonds, Series B, 4.75% due 5/15/2038   4,194
Colorado - 0.8%   1,030   Colorado Springs, Colorado, Utilities System Improvement Revenue Bonds, Subordinate Lien,    
        Series C, 5% due 11/15/2045 (g)   1,061
Portfolio Abbreviations            

To simplify the listings of BlackRock Investment Quality Municipal Trust's portfolio holdings in the Schedule of Investments, we have abbreviated the names of many of the securities according to the list below.

            AMT             Alternative Minimum Tax (subject to)                         HFA             Housing Finance Agency
  EDA   Economic Development Authority   IDA   Industrial Development Authority
  EDR   Economic Development Revenue Bonds   S/F   Single-Family
  GO   General Obligation Bonds        

1

BlackRock Investment Quality Municipal Trust    
Schedule of Investments as of January 31, 2008 (Unaudited)  
(in Thousands)
    Face        
State   Amount   Municipal Bonds  
Value
  $ 1,020   Park Creek Metropolitan District, Colorado, Senior Limited Tax Supported Revenue Refunding Bonds,    
        5.50% due 12/01/2037 $ 987
Connecticut - 1.2%   3,000   Mashantucket Western Pequot Tribe, Connecticut, Special Revenue Refunding Bonds,    
        Sub-Series A, 5.50% due 9/01/2028   2,914
District of Columbia -   4,960   District of Columbia Tobacco Settlement Financing Corporation, Asset-Backed Revenue    
2.1%       Refunding Bonds, 6.50% due 5/15/2033   5,103
Florida - 18.1%   2,050   FishHawk Community Development District II, Florida, Special Assessment and Tax Allocation Bonds,    
        Series A, 6.125% due 5/01/2034   2,022
    2,415   Halifax Hospital Medical Center, Florida, Hospital Revenue Refunding Bonds, Series A, 5% due 6/01/2038   2,214
    3,700   Hillsborough County, Florida, IDA, Exempt Facilities Revenue Bonds (National Gypsum Company),    
        AMT, Series A, 7.125% due 4/01/2030   3,799
    1,690   Jacksonville, Florida, Health Facilities Authority, Hospital Revenue Bonds    
        (Baptist Medical Center Project), Series A, 5% due 8/15/2037   1,654
    4,755   Miami Beach, Florida, Health Facilities Authority, Hospital Revenue Refunding Bonds    
        (Mount Sinai Medical Center of Florida), 6.75% due 11/15/2021   4,959
    3,380   Miami-Dade County, Florida, Special Obligation Revenue Bonds, Sub-Series A, 5.19% due 10/01/2031 (i)(o)   980
    4,225   Miami-Dade County, Florida, Special Obligation Revenue Bonds, Sub-Series A, 5.20% due 10/01/2032 (i)(o)   1,160
    4,000   Miami-Dade County, Florida, Special Obligation Revenue Bonds, Sub-Series A, 5.21% due 10/01/2033 (i)(o)   1,037
    4,580   Miami-Dade County, Florida, Special Obligation Revenue Bonds, Sub-Series A, 5.21% due 10/01/2034 (i)(o)   1,123
    5,000   Miami-Dade County, Florida, Special Obligation Revenue Bonds, Sub-Series A, 5.22% due 10/01/2035 (i)(o)   1,160
    10,000   Miami-Dade County, Florida, Special Obligation Revenue Bonds, Sub-Series A, 5.23% due 10/01/2036 (i)(o)   2,195
    10,000   Miami-Dade County, Florida, Special Obligation Revenue Bonds, Sub-Series A, 5.24% due 10/01/2037 (i)(o)   2,070
    7,895   Orange County, Florida, Tourist Development, Tax Revenue Refunding Bonds, 4.75% due 10/01/2032 (m)   7,550
    3,730   Sumter Landing Community Development District, Florida, Recreational Revenue Bonds,    
        Sub-Series B, 5.70% due 10/01/2038   3,251
    8,340   Village Community Development District Number 5, Florida, Special Assessment Bonds,    
        5.625% due 5/01/2022   8,382
Georgia - 3.2%   1,760   Atlanta, Georgia, Airport Passenger Facility Charge and Subordinate Lien General Revenue Bonds,    
        Series J, 5% due 1/01/2034 (g)(p)   1,796
    4,000   Atlanta, Georgia, Water and Wastewater Revenue Bonds, 5% due 11/01/2034 (g)   4,115
    1,500   Milledgeville-Baldwin County, Georgia, Development Authority Revenue Bonds (Georgia College and State    
        University Foundation), 6% due 9/01/2014 (j)   1,786
Hawaii - 1.1%   2,500   Hawaii State Department of Budget and Finance, Special Purpose Revenue Refunding Bonds (Hawaiian Electric    
        Company, Inc.), AMT, Series D, 6.15% due 1/01/2020 (a)   2,568
Illinois - 13.5%   6,500   Bolingbrook, Illinois, GO, Refunding, Series A, 4.75% due 1/01/2038 (i)   6,519
    1,920   Centerpoint Intermodal Center Program Trust, Illinois, Tax Allocation Bonds, Class A, 8% due 6/15/2023 (l)   1,864
    3,210   Chicago, Illinois, Housing Authority, Capital Program Revenue Refunding Bonds, 5% due 7/01/2024 (g)   3,356
    3,540   Chicago, Illinois, O'Hare International Airport Revenue Refunding Bonds, Third Lien, AMT,    
        Series C-2, 5.25% due 1/01/2030 (g)   3,599
    5,000   Chicago, Illinois, Public Building Commission, Building Revenue Bonds, Series A, 7% due 1/01/2020 (c)(i)   6,419

2

BlackRock Investment Quality Municipal Trust    
Schedule of Investments as of January 31, 2008 (Unaudited)  
(in Thousands)
    Face        
State   Amount   Municipal Bonds  
Value
  $ 2,145   Illinois Municipal Electric Agency, Power Supply Revenue Bonds, 4.50% due 2/01/2035 (d) $ 2,023
    690   Illinois State Finance Authority Revenue Bonds (Friendship Village of Schaumburg),    
        Series A, 5.625% due 2/15/2037   618
    1,155   Illinois State Finance Authority Revenue Bonds (Monarch Landing, Inc. Project),    
        Series A, 7% due 12/01/2037   1,161
    5,800   Illinois State Finance Authority Revenue Bonds (Northwestern Memorial Hospital),    
        Series A, 5.50% due 8/15/2014 (j)   6,682
    700   Illinois State Financing Authority, Student Housing Revenue Bonds (MJH Education Assistance IV LLC),    
        Sub-Series B, 5.375% due 6/01/2035   349
Kentucky - 2.6%   13,500   Kentucky Economic Development Finance Authority, Health System Revenue Refunding Bonds (Norton    
        Healthcare, Inc.), Series B, 6.19% due 10/01/2023 (i)(o)   6,152
Maryland - 2.6%   5,000   Maryland State Community Development Administration, Department of Housing and Community Development,    
        Residential Revenue Refunding Bonds, AMT, Series A, 4.80% due 9/01/2042   4,620
    1,740   Maryland State Health and Higher Educational Facilities Authority, Revenue Refunding Bonds    
        (MedStar Health, Inc.), 5.50% due 8/15/2033   1,749
Massachusetts - 1.3%   3,075   Massachusetts State Water Resource Authority, General Revenue Refunding Bonds,    
        Series A, 5% due 8/01/2041   3,178
Michigan - 0.7%   1,670   Michigan State Hospital Finance Authority, Revenue Refunding Bonds (Henry Ford Health System),    
        Series A, 5.25% due 11/15/2046   1,650
Mississippi - 0.7%   1,900   Mississippi Business Finance Corporation Revenue Bonds (Northrop Grumman Ship System),    
        4.55% due 12/01/2028   1,752
Missouri - 3.4%   2,820   Missouri Joint Municipal Electric Utility Commission, Power Project Revenue Bonds    
        (Plum Point Project), 4.60% due 1/01/2036 (i)   2,630
    5,250   Missouri State Housing Development Commission, S/F Mortgage Revenue Refunding Bonds (Homeownership    
        Loan Program), AMT, Series B-1, 5.05% due 3/01/2038 (e)(f)   5,451
Nebraska - 3.3%   5,000   Omaha Public Power District, Nebraska, Electric System Revenue Bonds, Series A, 5% due 2/01/2034   5,114
    2,765   Omaha Public Power District, Nebraska, Electric System Revenue Bonds, Series A, 4.75% due 2/01/2044   2,746
Nevada - 0.9%   2,065   Clark County, Nevada, EDR, Refunding (Alexander Dawson School of Nevada Project), 5% due 5/15/2029   2,073
New Jersey - 3.5%   1,510   Middlesex County, New Jersey, Improvement Authority, Subordinate Revenue Bonds (Heldrich Center    
        Hotel/Conference Project), Series B, 6.25% due 1/01/2037   1,362
    7,000   New Jersey EDA, Cigarette Tax Revenue Bonds, 5.75% due 6/15/2029   6,964
New York - 5.8%   725   Albany, New York, IDA, Civic Facility Revenue Bonds (New Covenant Charter School Project),    
        Series A, 7% due 5/01/2035   587
    2,600   New York City, New York, City IDA, Special Facility Revenue Bonds (American Airlines, Inc. - JFK International    
        Airport), AMT, 7.625% due 8/01/2025   2,780
    2,500   New York City, New York, City Municipal Water Finance Authority, Water and Sewer System Revenue Bonds,    
        Series D, 5% due 6/15/2038   2,577

3

BlackRock Investment Quality Municipal Trust    
Schedule of Investments as of January 31, 2008 (Unaudited)  
(in Thousands)
    Face        
State   Amount   Municipal Bonds  
Value
  $ 4,100   New York Liberty Development Corporation Revenue Bonds (Goldman Sachs Headquarters),    
        5.25% due 10/01/2035 $ 4,303
    1,865   New York State Dormitory Authority, Revenue Refunding Bonds (University of Rochester),    
        Series A, 6% due 7/01/2010 (i)(j)(o)   1,776
    2,030   New York State Dormitory Authority, Revenue Refunding Bonds (University of Rochester),    
        Series A, 6.05% due 7/01/2010 (i)(j)(o)   1,933
North Carolina - 2.7%   2,425   Gaston County, North Carolina, Industrial Facilities and Pollution Control Financing Authority, Revenue Bonds    
        (National Gypsum Company Project), AMT, 5.75% due 8/01/2035   2,288
    4,315   North Carolina Medical Care Commission, Health Care Facilities Revenue Bonds    
        (Novant Health Obligation Group), 5% due 11/01/2039   4,271
Ohio - 8.9%   1,870   Buckeye Tobacco Settlement Financing Authority, Ohio, Tobacco Settlement Asset-Backed Bonds,    
        Series A-2, 6.50% due 6/01/2047   1,920
    3,485   Cuyahoga County, Ohio, Revenue Refunding Bonds, Series A, 6% due 1/01/2020   3,919
    5,000   Cuyahoga County, Ohio, Revenue Refunding Bonds, Series A, 6% due 1/01/2021   5,617
    10,475   Ohio State Air Quality Development Authority, Revenue Refunding Bonds (Dayton Power and Light Company    
        Project), Series B, 4.80% due 1/01/2034 (d)   10,055
Oklahoma - 2.1%   2,110   Oklahoma State Development Finance Authority, Revenue Refunding Bonds    
        (Saint John Health System), 5% due 2/15/2042   2,076
    2,900   Tulsa, Oklahoma, Municipal Airport Trust, Revenue Refunding Bonds, Series A, 7.75% due 6/01/2035   3,091
Pennsylvania - 6.6%   2,000   Delaware River Port Authority of Pennsylvania and New Jersey Revenue Bonds (Port District Project),    
        Series B, 5.70% due 1/01/2022 (g)   2,087
    2,435   McKeesport, Pennsylvania, Area School District, GO, Refunding, 5.53% due 10/01/2031 (d)(o)   708
    870   McKeesport, Pennsylvania, Area School District, GO, Refunding, 5.53% due 10/01/2031 (c)(d)(o)   282
    2,000   Pennsylvania Economic Development Financing Authority, Exempt Facilities Revenue Bonds (Amtrak Project),    
        AMT, Series A, 6.25% due 11/01/2031   2,065
    3,100   Pennsylvania Economic Development Financing Authority, Exempt Facilities Revenue Bonds (Amtrak Project),    
        AMT, Series A, 6.375% due 11/01/2041   3,211
    6,380   Pennsylvania Economic Development Financing Authority, Exempt Facilities Revenue Bonds (Reliant Energy),    
        AMT, Series A, 6.75% due 12/01/2036   6,517
    980   Pennsylvania HFA, S/F Mortgage Revenue Refunding Bonds, AMT, Series 97A, 4.60% due 10/01/2027   932
Rhode Island - 0.1%   200   Rhode Island State Health and Educational Building Corporation, Hospital Revenue Refunding Bonds (Lifespan    
        Obligation Group), 5.50% due 5/15/2016 (i)   204
South Carolina - 4.9%   4,975   South Carolina Housing Finance and Development Authority, Mortgage Revenue Refunding Bonds,    
        AMT, Series A-2, 5.15% due 7/01/2037 (a)   4,872
    2,185   South Carolina Jobs EDA, Hospital Facilities Revenue Refunding Bonds (Palmetto Health Alliance),    
        Series A, 6.25% due 8/01/2031   2,259
    4,000   South Carolina Jobs EDA, Hospital Facilities Revenue Refunding Bonds (Palmetto Health Alliance),    
        Series C, 6.875% due 8/01/2013 (j)   4,816

4

BlackRock Investment Quality Municipal Trust    
Schedule of Investments as of January 31, 2008 (Unaudited)  
(in Thousands)
    Face        
State   Amount   Municipal Bonds  
Value
Tennessee - 2.1% $ 4,865   Memphis-Shelby County, Tennessee, Airport Authority, Airport Revenue Bonds, AMT,    
        Series D, 6% due 3/01/2024 (a) $ 5,066
Texas - 14.6%   6,000   Grapevine, Texas, GO, 5.875% due 8/15/2010 (d)(j)   6,520
    5,000   Harris County-Houston Sports Authority, Texas, Revenue Refunding Bonds, Senior Lien,    
        Series A, 6.146% due 11/15/2038 (i)(o)   914
    9,495   La Joya, Texas, Independent School District, GO, 5% due 2/15/2034   9,713
    20   Lower Colorado River Authority, Texas, Revenue Refunding Bonds, 5% due 5/15/2013 (i)(j)   22
    925   Lower Colorado River Authority, Texas, Revenue Refunding Bonds, 5% due 5/15/2031 (i)   945
    3,595   Lower Colorado River Authority, Texas, Revenue Refunding Bonds, 4.75% due 5/15/2036 (a)   3,578
    5   Lower Colorado River Authority, Texas, Revenue Refunding Bonds, Series A, 5% due 5/15/2013 (i)(j)   6
    675   Montgomery County, Texas, Municipal Utility District Number 46, Waterworks and Sewer System,    
        GO, 4.75% due 3/01/2030 (i)   657
    2,010   Pearland, Texas, GO, Refunding, 4.75% due 3/01/2029 (d)   2,018
    2,550   SA Energy Acquisition Public Facilities Corporation, Texas, Gas Supply Revenue Bonds, 5.50% due 8/01/2024   2,632
    15,000   Texas State Turnpike Authority, Central Texas Turnpike System Revenue Bonds, 6.06% due 8/15/2031 (a)(o)   3,959
    3,325   Texas State Turnpike Authority, Central Texas Turnpike System Revenue Bonds, First Tier,    
        Series A, 5% due 8/15/2042 (a)   3,271
    1,000   Texas State, Water Financial Assistance, GO, Refunding, 5.75% due 8/01/2022   1,056
Utah - 0.8%   1,950   Intermountain Power Agency, Utah, Power Supply Revenue Refunding Bonds, 5% due 7/01/2013 (a)(c)   1,954
Virginia - 1.0%   2,900   Tobacco Settlement Financing Corporation of Virginia, Revenue Refunding Bonds,    
        Senior Series B-1, 5% due 6/01/2047   2,445
Washington - 0.6%   1,420   King County, Washington, Sewer Revenue Refunding Bonds, 5% due 1/01/2036 (g)   1,468
Wisconsin - 1.4%   3,220   Wisconsin State Health and Educational Facilities Authority Revenue Bonds    
        (Aurora Health Care, Inc.), 6.40% due 4/15/2033   3,384
Wyoming - 0.8%   2,145   Wyoming Community Development Authority, Housing Revenue Bonds, AMT,    
        Series 3, 4.75% due 12/01/2037   1,996
Puerto Rico - 2.7%   3,115   Puerto Rico Commonwealth Highway and Transportation Authority, Transportation Revenue Refunding Bonds,    
        Series N, 5.25% due 7/01/2034 (b)   3,423
    2,900   Puerto Rico Electric Power Authority, Power Revenue Refunding Bonds, Series UU, 5% due 7/01/2023 (g)   3,056
        Total Municipal Bonds (Cost - $344,433) - 145.5%   350,918
        Corporate Bonds    
Multi-State - 5.1%   7,000   Charter Mac Equity Issuer Trust, 7.60% due 11/30/2050 (l)   7,766
    4,000   MuniMae TE Bond Subsidiary LLC, 7.75% due 6/30/2050 (l)   4,401
        Total Corporate Bonds (Cost - $11,000) - 5.1%   12,167

5

BlackRock Investment Quality Municipal Trust    
Schedule of Investments as of January 31, 2008 (Unaudited)  
(in Thousands)
  Shares          
  Held   Short-Term Securities  
Value
 
  21,800   Merrill Lynch Institutional Tax-Exempt Fund, 2.47% (h)(k) $ 21,800  
      Total Short-Term Securities (Cost - $21,800) - 9.0%   21,800  
      Total Investments (Cost - $377,233*) - 159.6%   384,885  
      Other Assets Less Liabilities - 1.2%   2,923  
      Preferred Shares, at Redemption Value - (60.8%)   (146,618
)
      Net Assets Applicable to Common Shares - 100.0% $ 241,190  

 

*        

The cost and unrealized appreciation (depreciation) of investments as of January 31, 2008, as computed for income tax purposes, were as follows:
 
         Aggregate cost   $ 376,550  
  Gross unrealized appreciation                                            $ 14,286  
  Gross unrealized depreciation     (6,634
)
  Net unrealized appreciation   $ 7,652  
   
(a)      

AMBAC Insured.
(b)      

Assured Guaranty Insured.
(c)      

Escrowed to maturity.
(d)      

FGIC Insured.
(e)      

FHLMC Collateralized.
(f)      

FNMA/GNMA Collateralized.
(g)      

FSA Insured.
(h)      

Investments in companies considered to be an affiliate of the Trust, for purposes of Section 2 (a)(3) of the Investment Company Act of 1940, were as follows:
 
    Net       Dividend  
Affiliate   Activity       Income  
Merrill Lynch Institutional Tax-Exempt Fund   16,300               $
96
 
               
(i)      

MBIA Insured.

(j)      

Prerefunded.
(k)      

Represents the current yield as of January 31, 2008.
(l)      

The security may be offered and sold to "qualified institutional buyers" under Rule 144A of the Securities Act of 1933.
(m)      

XL Capital Insured.
(n)      

CIFG Insured.
(o)      

Represents a zero coupon or step bond; the interest rate shown reflects the effective yield at the time of purchase.
(p)      

All, or a portion of, security held as collateral in connection with open financial futures contracts.
 

6

BlackRock Investment Quality Municipal Trust    
Schedule of Investments as of January 31, 2008 (Unaudited)   (in Thousands)
  • Financial futures contracts sold as of January 31, 2008 were as follows:
 
Number of               Expiration                 Face            
Unrealized
Contracts   Issue   Date       Value   Depreciation
195   10-Year U.S. Treasury Bond   March 2008   $   21,983   $                    (777)
  • Forward interest rate swaps outstanding as of January 31, 2008 were as follows:
 
   
Notational
               Unrealized
    Amount     Depreciation
Pay a fixed rate of 4.3385% and receive a floating rate based on 3-month USD LIBOR                                 
Broker, JPMorgan Chase          
Expires May 2018 $
18,320
 
$
(98)
Pay a fixed rate of 3.585% and receive a floating rate based on 1-week (SIFMA)          
Municipal Swap Index Rate          
Broker, JPMorgan Chase          
Expires April 2023 $
31,250
    (197)
Total      
$
(295)

 

 

 

7

Item 2 –  Controls and Procedures

2(a) –     The registrant’s principal executive and principal financial officers or persons performing similar functions have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”)) are effective as of a date within 90 days of the filing of this report based on the evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended.

2(b) –     There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act) that occurred during the registrant’s last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 3 –  Exhibits

Certifications – Attached hereto

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

BlackRock Investment Quality Municipal Trust, Inc.

By:   
/s/ Donald C. Burke
  Donald C. Burke
  Chief Executive Officer of
  BlackRock Investment Quality Municipal Trust, Inc.

Date: March 24, 2008

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:   
/s/ Donald C. Burke
  Donald C. Burke
  Chief Executive Officer (principal executive officer) of
 
BlackRock Investment Quality Municipal Trust, Inc.
   
Date: March 24, 2008
   
By:
/s/ Neal J. Andrews
  Neal J. Andrews
  Chief Financial Officer (principal financial officer) of
 
BlackRock Investment Quality Municipal Trust, Inc.
   
Date: March 24, 2008