Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
The Board of Directors
Jack in the Box Inc.:
We consent to the incorporation by reference in the registration statements (Nos. 33-67450,
33-51490, 333-85669, 333-127765, 333-26781, 333-88356, 333-26781, 333-115619, 333-134186 and
333-143032) on Form S-8 of Jack in the Box Inc. of our reports dated
November 16, 2007, with
respect to the consolidated balance sheets of Jack in the Box Inc. as of September 30, 2007 and
October 1, 2006, and the related consolidated statements of earnings, cash flows, and stockholders
equity for the fifty-two weeks ended September 30, 2007, October 1, 2006, and October 2, 2005, and
the effectiveness of internal control over financial reporting as of September 30, 2007, which
reports appear in the September 30, 2007, annual report on Form 10-K of Jack in the Box Inc.
Our report on the consolidated financial statements dated November 16, 2007, contains an
explanatory paragraph that states that the Company adopted Statement of Financial Accounting
Standards No. 123 (revised 2004), Share-Based Payment, and Financial Accounting Standards Board
Interpretation No. 47, Accounting for Conditional Asset Retirement Obligations, in fiscal year
2006, and Financial Accounting Standards No. 158, Employers Accounting for Defined Benefit Pension
and Other Postretirement Plans an amendment of FASB Statements No. 87, 88, 106 and 132(R), and
changed its method of quantifying errors in fiscal year 2007.
/s/ KPMG LLP
San Diego, California
November 16, 2007