EXHIBIT 4

      CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO SECTION 1350 OF
        CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE (18 U.S.C. 1350)

In  connection  with the  report of  Canadian  Natural  Resources  Limited  (the
"Company")  on the Form 40-F for the fiscal  year  ending  December  31, 2007 as
filed with the  Securities  and  Exchange  Commission  on the date  hereof  (the
"Report"),  I, Steve W. Laut,  certify  pursuant to 18 U.S.C.  1350,  as adopted
pursuant to Section 906 of the  Sarbanes-Oxley  Act of 2002, that to the best of
my knowledge:

1.   The Report fully complies with the  requirements  of section 13(a) or 15(d)
     of the Securities Exchange Act of 1934; and

2.   The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of the Company.

DATED this 27th day of March, 2008.



CANADIAN NATURAL RESOURCES LIMITED


By:    /S/ Steve W. Laut
       ---------------------------------------------------
       Name:  Steve W. Laut
       Title: President and Chief Operating Officer
              (Principal Executive Officer)