EXHIBIT 32.1


              SECTION 1350 CERTIFICATION OF CHIEF EXECUTIVE OFFICER


In  connection  with  the  Annual Report of P.A.M. Transportation Services, Inc.
(the  "Company")  on  Form  10-K  for  the period ending December 31, 2005, (the
"Report")  filed  with  the  Securities  and  Exchange  Commission, I, Robert W.
Weaver,  Chief  Executive Officer of the Company, certify, pursuant to 18 U.S.C.
Section  1350,  as  adopted pursuant to Section 906 of the Sarbanes-Oxley Act of
2002, that to the best of my knowledge:

     (1)  The  Report  fully  complies with the requirements of section 13(a) or
          15(d) of the Securities Exchange Act of 1934; and

     (2)  The  information  contained  in  the  Report  fairly  presents, in all
          material respects, the financial condition and results of operations
          of the Company.


Date:  March 8, 2006

/s/  Robert W. Weaver
- -----------------------
Robert W. Weaver
President and Chief Executive Officer
(chief executive officer)

                                      -68-