Exhibit 23.3

Consent of Independent Registered Public Accounting Firm

The Board of Directors

Zion Oil & Gas, Inc.

We consent to the incorporation by reference in the Registration Statement on Form S-3 (File No. 333-148982) of Zion Oil & Gas,  Inc .of our report dated March 16, 2010, with respect to the balance sheets of Zion Oil & Gas, Inc. (a development stage company) as of December 31, 2009 and 2008, and the related statements of operations, stockholders' equity and cash flows for each of the years then ended and for the period from April 6, 2000 (inception) to December 31, 2009, and the effectiveness of internal control over financial reporting as of December 31, 2009, which report appears in the December 31, 2009 Annual Report on Form 10-K of Zion Oil & Gas, Inc.,

Our report dated March 16 2010 contains an explanatory paragraph that states that Zion Oil & Gas Inc. is in the development stage and has no operating revenue, limited capital resources and a loss from operations, all of which raise substantial doubt about its ability to continue as a going concern.  The financial statements do not include any adjustments that might result from the outcome of that uncertainty.

/s/ Somekh Chaikin

Certified Public Accountants (Isr.)

A Member of KPMG International

Tel Aviv Israel

March 16, 2010