EXHIBIT 32.2

                            CERTIFICATION PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
                   (SUBSECTIONS (A) AND (B) OF SECTION 1350,
                  CHAPTER 63 OF TITLE 18, UNITED STATES CODE)

     Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a)
and (b) of Section 1350, Chapter 63 of Title 18, United States Code), I, Paul
Boling, Vice President and Chief Financial Officer of Carrizo Oil & Gas, Inc., a
Texas corporation (the "Company"), hereby certify, to my knowledge, that:

     (1)  the Company's Annual Report on Form 10-K for the year ended December
          31, 2004 (the "Report") fully complies with the requirements of
          Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

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


Dated: March 31, 2005                           /s/ Paul F. Boling
                                              ----------------------------------
                                              Name: Paul F. Boling
                                                    Vice President and
                                                    Chief Financial Officer

The foregoing certification is being furnished solely pursuant to Section 906 of
the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter
63 of Title 18, United States Code) and is not being filed as part of the Report
or as a separate disclosure document.

A signed original of this written statement required by Section 906 has been
provided to Carrizo Oil & Gas, Inc. and will be retained by Carrizo Oil & Gas,
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.