EXHIBIT 32.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

         In connection with the Annual Report of Input/Output, Inc. (the
"Company") on Form 10-K/A for the year ending December 31, 2003, as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I, J.
Michael Kirksey, Executive Vice President and Chief Financial 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:

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.


                            /s/ J. Michael Kirksey
                            ----------------------------------------------------
                            J. Michael Kirksey
                            Executive Vice President and Chief Financial Officer

Date: April 23, 2004