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 Mitcham Industries, Inc. (the “Company”) on Form 10-K for the fiscal year ended January 31, 2004, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Christopher C. Siffert, Vice President & Corporate Controller of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 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, except as to the late filing; 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/ Christopher C. Siffert

Christopher C. Siffert

Vice President & Corporate Controller

May 28, 2004