EXHIBIT 31.1

           RULE 13a-14(a) CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER


I, ROBERT W. WEAVER, President and Chief Executive Officer, certify that:

(1)  I have reviewed this annual report on Form 10-K of P.A.M. TRANSPORTATION
     SERVICES, INC., a Delaware corporation (the "registrant");

(2)  Based on my knowledge, this report does not contain any untrue statement of
     a  material  fact  or  omit  to state a material fact necessary to make the
     statements  made, in light of the circumstances under which such statements
     were  made,  not  misleading  with  respect  to  the period covered by this
     report;

(3)  Based  on  my  knowledge,  the  financial  statements,  and other financial
     information  included  in  this  report,  fairly  present  in  all material
     respects  the  financial condition, results of operations and cash flows of
     the registrant as of, and for, the periods presented in this report;

(4)  The  registrant's  other  certifying  officer  and  I  are  responsible for
     establishing and maintaining disclosure controls and procedures (as defined
     in  Exchange  Act  Rules 13a-15(e) and 15d-15(e)) and internal control over
     financial  reporting  (as  defined  in  Exchange  Act  Rules  13a-15(f) and
     15d-15(f)) for the registrant and have:

     (a)  Designed  such  disclosure  controls  and  procedures,  or caused such
          disclosure  controls  and  procedures  to  be  designed  under  our
          supervision,  to  ensure  that  material  information  relating to the
          registrant,  including its consolidated subsidiaries, is made known to
          us  by others within those entities, particularly during the period in
          which this report is being prepared;

     (b)  Designed  such  internal  control  over financial reporting, or caused
          such  internal  control  over financial reporting to be designed under
          our  supervision,  to  provide  reasonable  assurance  regarding  the
          reliability  of  financial  reporting and the preparation of financial
          statements for external purposes in accordance with generally accepted
          accounting principles;

     (c)  Evaluated  the  effectiveness  of the registrant's disclosure controls
          and  procedures and presented in this report our conclusions about the
          effectiveness of the disclosure controls and procedures, as of the end
          of the period covered by this report based on such evaluation; and

     (d)  Disclosed  in  this  report  any  change  in the registrant's internal
          control over financial reporting that occurred during the registrant's
          most  recent fiscal quarter (the registrant's fourth fiscal quarter in
          the  case  of  an  annual  report) that has materially affected, or is
          reasonably  likely  to  materially  affect,  the registrant's internal
          control over financial reporting; and

(5)  The  registrant's  other  certifying officer and I have disclosed, based on
     our most recent evaluation of internal control over financial reporting, to
     the registrant's auditors and the audit committee of the registrant's board
     of directors (or persons performing the equivalent functions):

     (a)  All  significant deficiencies and material weaknesses in the design or
          operation  of  internal  control  over  financial  reporting which are
          reasonably  likely  to  adversely  affect  the registrant's ability to
          record, process, summarize and report financial information; and

     (b)  Any  fraud, whether or not material, that involves management or other
          employees  who  have  a  significant role in the registrant's internal
          control over financial reporting.

Date:  March 14, 2005

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

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