Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our firm under the caption “Experts” in Amendment No. 1 to the Registration Statement (Form S-3 No. 333-124746) and related Prospectus of PetroQuest Energy, Inc. for the registration of 2,152,692 shares of its common stock, and to the incorporation by reference therein of our reports dated March 2, 2005, with respect to the consolidated financial statements of PetroQuest Energy, Inc., PetroQuest Energy, Inc. management’s assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of PetroQuest Energy, Inc., included in its Annual Report (Form 10-K) for the year ended December 31, 2004, filed with the Securities and Exchange Commission.

/s/ Ernst & Young LLP

New Orleans, Louisiana
May 19, 2005