EXHIBIT 32.1

Accompanying Certificate
Pursuant to Rule 13a – 14(b) or Rule 15d – 14(b)
and 18 U.S.C Section 1350

Not Filed Pursuant to the Securities Exchange Act of 1934

     The undersigned Chief Executive Officer of Harvest Natural Resources, Inc. (the “Company”) does hereby certify as follows:

     This report on Form 10-Q of Harvest Natural Resources, Inc. for the period ended March 31, 2008 and filed with the Securities and Exchange Commission on the date hereof (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: May 1, 2008	By:	/s/ James A. Edmiston
		James A. Edmiston
		President and Chief Executive Officer