USA Truck (USAK) 10-Q 2005 Q1 Quarterly report

EXHIBIT 32.2

CERTIFICATION PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

(18 U.S.C. SECTION 1350)

In connection with this quarterly report on Form 10-Q of USA Truck, Inc. for the period ended March 31, 2005 (the “Report”), I, Clifton R. Beckham, Senior Vice President – Finance, Chief Financial Officer and Secretary of USA Truck, Inc., certify pursuant to 18 U.S.C. 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of USA Truck, Inc.

Date: April 28, 2005

/s/ Clifton R. Beckham

Clifton R. Beckham

Sr. Vice President – Finance,

Chief Financial Officer and Secretary

A signed original of this written statement required by Section 906 has been provided to USA Truck, Inc. and will be retained by USA Truck, Inc. and furnished to the Securities and Exchange Commission or its staff upon request.