Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the inclusion in this Registration Statement of Medizone International, Inc. on Form S-8, of our audit report dated July 6, 2008, which includes an emphasis paragraph relating to an uncertainty as to the Company’s ability to continue as a going concern.

We also consent to the reference to our Firm under the captions “Experts” in the Prospectus.

/s/   HJ Associates & Consultants, LLP

HJ Associates & Consultants, LLP

Salt Lake City, Utah

September 17, 2008