Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  Kutter Erick
 2. Date of Event Requiring Statement (Month/Day/Year)
05/24/2006		 3. Issuer Name and Ticker or Trading Symbol
KNIGHT TRANSPORTATION INC [KNX]
(Last)
(First)
(Middle)
5601 WEST BUCKEYE ROAD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Pres. Knight Refrigerated, LLC
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PHOENIX, AZ 85043		 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock, par value $0.01 per share 22,073
D
 

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Employee Stock Option (right to buy) 10/12/2001 10/12/2010 Common Stock, par value $0.01 per share 10,125 $ 2.8518 D  
Employee Stock Option (right to buy) 09/17/2002(1) 09/17/2011 Common Stock, par value $0.01 per share 13,500 $ 4.8889 D  
Employee Stock Option (right to buy) 06/04/2005(2) 06/04/2012 Common Stock, par value $0.01 per share 9,000 $ 8.4445 D  
Employee Stock Option (right to buy) 08/07/2006(3) 08/06/2013 Common Stock, par value $0.01 per share 11,250 $ 11.4356 D  
Employee Stock Option (right to buy) 03/19/2007(4) 03/18/2014 Common Stock, par value $0.01 per share 11,250 $ 10.5378 D  
Employee Stock Option (right to buy) 05/11/2007(5) 05/10/2014 Common Stock, par value $0.01 per share 11,250 $ 10.44 D  
Employee Stock Option (right to buy) 01/31/2008(6) 01/30/2015 Common Stock, par value $0.01 per share 7,500 $ 16.3867 D  
Employee Stock Option (right to buy) 05/16/2008(7) 05/15/2015 Common Stock, par value $0.01 per share 15,000 $ 15.5334 D  
Employee Stock Option (right to buy) 05/24/2009(8) 05/23/2016 Common Stock, par value $0.01 per share 15,000 $ 18.44 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Kutter Erick
5601 WEST BUCKEYE ROAD
PHOENIX, AZ 85043		       Pres. Knight Refrigerated, LLC  

Signatures

/s/ Erick Kutter 06/08/2006
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) 9,000 shares of common stock are currently vested; the remaining 4,500 shares of common stock will vest on September 18, 2006.
(2) 3,000 shares of common stock are currently vested; the remaining shares will vest in equal 3,000 increments on June 6, 2006 and June 5, 2007.
(3) This option will vest in equal shares of 2,250 on August 7, 2006, August 7, 2007, August 7, 2008, August 7, 2009 and August 7, 2010
(4) This option will vest in equal shares of 2,250 on March 19, 2007, March 19, 2008, March 19, 2009, March 19, 2010 and March 19, 2011
(5) This option will vest in equal shares of 2,250 on May 11, 2007, May 11, 2008, May 11, 2009, May 11, 2010 and May 11, 2011
(6) This option will vest in equal shares of 1,500 on January 31, 2008, January 31, 2009, January 31, 2010, January 31, 2011 and January 31, 2012
(7) This option will vest in equal shares of 3,000 on May 16, 2008, May 16, 2009, May 16, 2010, May 16, 2011 and May 16, 2012
(8) This option will vest in equal 20% increments per year beginning on May 24, 2009

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