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 *
  Collins Steve
 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 ROD		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Controller
 5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

PHOENIX, AZ 85004		 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)

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) 02/24/2006(1) 02/23/2013 Common Stock, par value $0.01 per share 2,250 $ 8.56 D  
Employee Stock Option (right to buy) 08/07/2006(2) 08/06/2013 Common Stock, par value $0.01 per share 1,125 $ 11.4356 D  
Employee Stock Option (right to buy) 03/19/2007(3) 03/18/2014 Common Stock, par value $0.01 per share 1,913 $ 10.5378 D  
Employee Stock Option (right to buy) 04/26/2008(4) 04/25/2015 Common Stock, par value $0.01 per share 1,275 $ 14.48 D  
Employee Stock Option (right to buy) 11/15/2008(5) 11/14/2015 Common Stock, par value $0.01 per share 3,750 $ 20.0467 D  
Employee Stock Option (right to buy) 05/24/2009(6) 05/23/2016 Common Stock, par value $0.01 per share 4,000 $ 18.44 D  

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
Collins Steve
5601 WEST BUCKEYE ROD
PHOENIX, AZ 85004		       Controller  

Signatures

/s/ Steve Collins 06/05/2006
**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) This option will vest in three (3) equal shares of 750 on February 24, 2006, February 24, 2007 and 750 on February 24, 2008
(2) This option will vest in equal shares of 225 on August 7, 2006, August 7, 2007, August 7, 2008, August 7, 2009 and August 7, 2010
(3) This option will vest as follows: 382 shares on March 19, 2007; 383 shares on March 19, 2008; 382 shares on March 19, 2009; 383 shares on March 19, 2010; and 383 shares on March 19, 2011
(4) This option will vest in equal shares of 255 on April 26, 2008, April 26, 2009, April 26, 2010, April 26, 2011 and April 26, 2012
(5) This option will vest in equal shares of 750 November 15, 2008, November 15, 2009, November 15, 2010, November 15, 2011 and November 15, 2012
(6) This option vest in increments of twenty percent (20%) per year starting on May 24, 2009

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