UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 11-K


(Mark One)

[X]  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934 [FEE REQUIRED]

For the fiscal year ended December 31, 2002

                                       or

[ ]  TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934 [NO FEE REQUIRED]

For the transition period from ___________ to ______________

Commission file number 0-20793

A.   Full title of the plan and the address of the plan, if different from that
     of the issuer named below:

              SMITHWAY MOTOR XPRESS, INC. 401(k) RETIREMENT SAVINGS
                               AND INVESTMENT PLAN

B.   Name of issuer of the securities held pursuant to the plan and the address
     of its principal executive office:

                           Smithway Motor Xpress Corp.
                                2031 Quail Avenue
                             Fort Dodge, Iowa 50501

















                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN

                        Financial Statements and Schedule

                           December 31, 2002 and 2001

                   (With Independent Auditors' Report Thereon)













                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN



                                Table of Contents



                                                                       Page

Independent Auditors' Report                                             1

Statements of Net Assets Available for Plan Benefits                     2

Statements of Changes in Net Assets Available for Plan Benefits          3

Notes to Financial Statements                                            4

Schedule

1   Schedules of Assets Held for Investment Purposes                     7







                          Independent Auditors' Report



The Plan Trustees
Smithway Motor Xpress, Inc. 401(k) Retirement Savings and Investment Plan:


We have audited the  statements  of net assets  available  for plan  benefits of
Smithway Motor Xpress,  Inc. 401(k) Retirement  Savings and Investment Plan (the
Plan) as of December 31, 2002 and 2001, and the related statements of changes in
net assets available for plan benefits for the years then ended. These financial
statements are the responsibility of the Plan's  management.  Our responsibility
is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the  United  States of  America.  Those  standards  require  that we plan and
perform the audit to obtain  reasonable  assurance  about  whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management,  as well as evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

In our opinion,  the financial  statements  referred to above present fairly, in
all material  respects,  the net assets  available for plan benefits of Smithway
Motor Xpress,  Inc. 401(k) Retirement Savings and Investment Plan as of December
31, 2002 and 2001, and the changes in its net assets available for plan benefits
for the years then ended,  in conformity with  accounting  principles  generally
accepted in the United States of America.

Our audit of the  Plan's  financial  statements  as of and for the  years  ended
December  31,  2002 and 2001,  was made for the purpose of forming an opinion on
the  financial  statements  taken as a whole.  The  supplemental  schedule  1 is
presented for the purpose of  additional  analysis and is not a required part of
the basic financial statements, but is supplementary information required by the
Department of Labor's Rules and Regulations  for Reporting and Disclosure  under
the Employee Retirement Income Security Act of 1974. This supplemental  schedule
is the  responsibility of the Plan's management.  The supplemental  schedule has
been  subjected  to the auditing  procedures  applied in the audits of the basic
financial  statements  and, in our opinion,  is fairly  stated,  in all material
respects, in relation to the basic financial statements taken as a whole.

                         /s/ KPMG LLP


Des Moines, Iowa
May 16, 2003



                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN

              Statements of Net Assets Available for Plan Benefits

                           December 31, 2002 and 2001

                                                                         2002            2001
                                                                    --------------   --------------
                                                                               
Assets:
  Cash                                                             $      325,731         435,897
                                                                    --------------   --------------
  Investments (note 9):
    Investment in registered investment companies                       6,739,050       8,351,371
    Common stock                                                          406,954         998,628
    Loans to participants                                                 521,500         646,085
                                                                    --------------   --------------
                                                                        7,667,504       9,996,084
                                                                    --------------   --------------
  Contributions receivable - employees                                     79,964          86,940
  Contributions receivable - employer                                          --           4,511
  Other receivables                                                           207          27,757
                                                                    --------------   --------------
             Total assets                                               8,073,406      10,551,189

Liabilities (note 6)                                                       16,098         139,354
                                                                    --------------   --------------
             Net assets available for benefits (note 2)            $    8,057,308      10,411,835
                                                                    ==============   ==============


See accompanying notes to financial statements.



                                       2


                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN

         Statements of Changes in Net Assets Available for Plan Benefits

                     Years ended December 31, 2002 and 2001


                                                                                          2002                  2001
                                                                                   -------------------   -------------------
                                                                                                   
Additions to net assets attributed to:
  Employer contributions (note 3)                                               $            1,850                 4,511
  Employee contributions and rollovers (note 3)                                          1,085,241             1,302,499
                                                                                   -------------------   -------------------
            Total additions                                                              1,087,091             1,307,010
                                                                                   -------------------   -------------------
Deductions from net assets attributed to:
  Benefits paid to participants (note 5)                                                 1,362,817             1,265,558
  Net investment loss (notes 2 and 9)                                                    2,032,880             1,017,323
  Administrative fees                                                                       45,921                58,793
                                                                                   -------------------   -------------------
            Total deductions                                                             3,441,618             2,341,674
                                                                                   -------------------   -------------------
            Net decrease in net assets available for benefits                           (2,354,527)           (1,034,664)

Net assets available for benefits:
  Beginning of year                                                                     10,411,835            11,446,499
                                                                                   -------------------   -------------------
  End of year                                                                   $        8,057,308            10,411,835
                                                                                   ===================   ===================


See accompanying notes to financial statements.




                                       3



                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001


(1)  Summary of Significant Accounting Policies

     (a)  Plan Information and Basis of Presentation

          The accompanying  financial  statements of Smithway Motor Xpress, Inc.
          401(k)  Retirement  Savings and  Investment  Plan (the Plan) have been
          prepared on the  accrual  basis of  accounting  and are subject to the
          provisions  of the  Employee  Retirement  Income  Security Act of 1974
          (ERISA).  The Plan is  sponsored by Smithway  Motor Xpress Corp.  (the
          Company)  and has two entry dates per year.  Full-time  employees  are
          eligible  for  participation  in the Plan on the next entry date after
          completing one year of service and attaining  twenty-one years of age.
          Participants  should  refer to the Plan  agreement  for more  complete
          information.

     (b)  Investments

          Investments,   other  than  loans,  are  reported  at  fair  value  as
          determined by using available market information.  Purchases and sales
          of  securities   are  recorded  on  a  trade-date   basis.   Loans  to
          participants   are   valued  at  their   unpaid   principal   balance,
          representing estimated fair value.

          Net  investment  income  includes  investment  income,  realized gains
          (losses),  and unrealized  appreciation  (depreciation) on investments
          held.

     (c)  Administrative Fees

          Certain administrative fees are paid by the Company.

     (d)  Income Taxes

          The Internal  Revenue Service has issued a  determination  letter that
          the Plan is  qualified,  and the trust  established  under the Plan is
          tax-exempt,  under Sections 401(a) and 501(a) of the Internal  Revenue
          Code.  UMB Bank (the Plan  Administrator)  and the Plan's tax  counsel
          believe the Plan is currently designed and operated in compliance with
          the applicable  requirements of the Internal Revenue Code.  Therefore,
          they  believe  the  Plan  was  qualified  and the  related  trust  was
          tax-exempt as of December 31, 2002 and 2001.  Future  qualification of
          the Plan will depend on continuing  operation in  compliance  with the
          Internal Revenue Code.

     (e)  Use of Estimates

          The Plan  Administrator has made a number of estimates and assumptions
          relating to the reporting of assets, liabilities,  and changes therein
          to prepare these  financial  statements in conformity  with accounting
          principles generally accepted in the United States of America.  Actual
          results could differ from those estimates.

(2)  Net Assets Available for Benefits

     The Plan Administrator  maintains funds received from the Plan primarily in
     registered investment companies or in the Company's common stock.

                                       4                            (Continued)


                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001


(3)  Contributions

     Under the terms of the Plan agreement,  the Company may, at its discretion,
     make annual contributions to the Plan, which shall be allocated to eligible
     participants  based on a  percentage  of the  total  deferred  compensation
     contributed during the Plan year.  Forfeitures,  if any, are used to reduce
     future employer contributions.

     Employees may make voluntary  contributions  to the Plan up to 15% of their
     compensation,  subject  to certain  limitations  as  specified  in the Plan
     agreement.  Effective January 1, 2003, there will be no maximum  percentage
     applied to such deferrals and contributions will only be limited to certain
     IRS limitations.

(4)  Participant Accounts

     Each participant's account is credited with the participant's contribution,
     the  employer's  contribution,  and an  allocation of Plan  earnings.  Each
     participant  will be permitted to direct the Plan  Administrator  to invest
     their individual accounts into various approved investments permitted under
     the Plan.

     Participants are immediately  vested in their voluntary  contributions  and
     the earnings  thereon.  Vesting in the remainder of their accounts is based
     on years of service in which the  participant  has completed at least 1,000
     hours of service. A participant is 100% vested after six years of service.

(5)  Benefits

     Under the terms of the Plan agreement,  participants or their beneficiaries
     are eligible for benefits upon retirement,  death, or disability.  Benefits
     shall  be  distributed  through  one of  several  options  selected  by the
     participants, as defined in the Plan agreement.

(6)  Liabilities

     Liabilities  include refunds payable for excess  contributions  received by
     the  Plan  which  are  reimbursable  to the  participants,  benefit  claims
     payables, and other miscellaneous operating payables.

(7)  Plan Termination

     Although  the  Company  has not  expressed  any  intent  to  terminate  its
     participation  in  the  Plan,  it may do so at  any  time,  subject  to the
     provisions set forth in ERISA. Should the Plan be terminated at some future
     time,  all  participants  become 100%  vested in benefits  earned as of the
     termination date.

(8)  Party-in-interest Transactions

     Transactions  resulting  in Plan assets being  transferred  to or used by a
     related  party are  prohibited  under  ERISA  unless a  specific  exemption
     applies. UMB Bank, as Plan Administrator, is a party-in-interest as defined
     by ERISA as a result of investing Plan assets in its own funds. The Company
     is a  party-in-interest  as a result of the Plan participants being able to
     invest in Company stock. A participant who acquires a participant loan is a
     party-in-interest.  However,  such  transactions  are  exempt  and  are not
     prohibited by ERISA.


                                       5                            (Continued)


                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN

                          Notes to Financial Statements

                           December 31, 2002 and 2001

(9)  Investments

     The fair values of the  investments  of the Plan at  December  31, 2002 and
     2001 were as follows:

                                                                       2002                 2001
                                                                -------------------   ------------------
                                                                                   
Fidelity Asset Manager                                         $            --             1,517,708
Fidelity Magellan Fund                                                2,113,756            2,901,323
Capital Preservation Fund                                             1,066,795            1,096,486
PBHG Growth Fund                                                            --             1,159,480
Putnam Vista Fund                                                           --               641,742
Strong Government Securities                                          1,043,428              919,252
Smithway Motor Xpress Corp. common stock *                              406,954              998,628
Fidelity Equity Growth Fund                                              25,449               10,064
MFS Total Return Fund                                                 1,327,972               18,127
MFS Mid Cap Growth Fund                                               1,015,578               17,234
UMB Scout Worldwide Fund *                                                5,929                7,491
UMB Scout Equity Index Fund *                                            41,773               24,545
Washington Mutual Investors Fund                                         98,370               37,919
Participant Loans *                                                     521,500              646,085
                                                                -------------------   ------------------
                                                               $      7,667,504            9,996,084
                                                                ===================   ==================


     Included in net  investment  loss for the years ended December 31, 2002 and
     2001 is  (depreciation)  appreciation of investments  (including  gains and
     losses on investments bought and sold, as well as held during the year) and
     investment income as follows:

                                                                         2002                 2001
                                                                  -------------------   -----------------
                                                                                  
Registered investment companies                                $       (1,478,276)         (1,168,377)
Common stock *                                                           (594,065)             84,990
Participant loans *                                                        39,461              66,064
                                                                  -------------------   -----------------
                                                               $       (2,032,880)         (1,017,323)
                                                                  ===================   =================

* Party-in-interest


(10) Participant Loans

     Participants  are  allowed  to  borrow  from the  vested  portion  of their
     account.  The minimum loan is $1,000. The maximum loan is the lesser of 50%
     of the participant's vested account balance or $50,000.


                                       6


                                                                     Schedule 1

                       SMITHWAY MOTOR XPRESS, INC. 401(k)
                     RETIREMENT SAVINGS AND INVESTMENT PLAN

                Schedules of Assets Held for Investment Purposes

                           December 31, 2002 and 2001

                                                                                                     2002
                                                                                    ---------------------------------------
                                                                                                               Fair
                                  Description                                             Cost                 value
- ---------------------------------------------------------------------------------   ------------------   ------------------
                                                                                                   
Fidelity Magellan Fund                                                           $       2,506,700            2,113,756
Capital Preservation Fund                                                                1,066,795            1,066,795
Strong Government Securities                                                             1,011,931            1,043,428
Smithway Motor Xpress Corp. common stock *                                                 603,837              406,954
Fidelity Equity Growth Fund                                                                 29,414               25,449
MFS Total Return Fund                                                                    1,437,433            1,327,972
MFS Mid Cap Growth Fund                                                                  1,800,872            1,015,578
UMB Scout Worldwide Fund *                                                                   6,780                5,929
UMB Scout Equity Index Fund *                                                               48,265               41,773
Washington Mutual Investors Fund                                                           111,482               98,370
                                                                                    ------------------   ------------------
                                                                                         8,623,509            7,146,004
Loans to participants * (with interest rates from 4.25% to 10.5%
    and various maturity dates)                                                            521,500              521,500
                                                                                    ------------------   ------------------
                                                                                 $       9,145,009            7,667,504
                                                                                    ==================   ==================


                                                                                                     2001
                                                                                    ---------------------------------------
                                                                                                               Fair
                                  Description                                             Cost                 value
- ---------------------------------------------------------------------------------   ------------------   ------------------
                                                                                                   
Fidelity Asset Manager                                                           $       1,676,860            1,517,708
Fidelity Magellan Fund                                                                   2,629,159            2,901,323
Capital Preservation Fund                                                                1,096,486            1,096,486
PBHG Growth Fund                                                                         1,503,148            1,159,480
Putnam Vista Fund                                                                          968,774              641,742
Strong Government Securities                                                               913,798              919,252
Smithway Motor Xpress Corp. common stock *                                                 688,869              998,628
Fidelity Equity Growth Fund                                                                  9,937               10,064
MFS Total Return Fund                                                                       18,289               18,127
MFS Mid Cap Growth Fund                                                                     16,433               17,234
UMB Scout Worldwide Fund *                                                                   7,428                7,491
UMB Scout Equity Index Fund *                                                               24,184               24,545
Washington Mutual Investors Fund                                                            38,681               37,919
                                                                                    ------------------   ------------------
                                                                                         9,592,046            9,349,999
Loans to participants *                                                                    646,085              646,085
                                                                                    ------------------   ------------------
                                                                                 $      10,238,131            9,996,084
                                                                                    ==================   ==================

*Party-in-interest


See accompanying independent auditors' report.

                                       7



                                   SIGNATURES

The Plan.  Pursuant to the requirements of the Securities  Exchange Act of 1934,
the trustees (or other persons who  administer  the employee  benefit plan) have
duly  caused this  annual  report to be signed on its behalf by the  undersigned
hereunto duly authorized.

                           SMITHWAY MOTOR XPRESS, INC. 401(K)
                           RETIREMENT SAVINGS AND INVESTMENT
                           PLAN


Dated: June 27, 2003      By:    /s/ Tom Nelson
                             ---------------------------------
                                 Tom Nelson, Administrator













                                       8