Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-3 of our report dated February 28, 2006 relating to the consolidated financial statements, management’s assessment of the effectiveness of internal control over financial reporting and the effectiveness of internal control over financial reporting of Burlington Resources Inc., which appears in the 2005 Annual Report on Form 10-K of Burlington Resources Inc., which is incorporated by reference in ConocoPhillips’ Current Report on Form 8-K/A dated March 31, 2006. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

Houston, Texas
June 16, 2006