EXHIBIT 5
                                                                     ---------


                                 CERTIFICATION

         CERTIFICATION REQUIRED BY RULE 13A-14(B) AND SECTION 1350 OF
               CHAPTER 63 OF TITLE 18 OF THE UNITED STATES CODE

In  connection  with the report of Canadian  Natural  Resources  Limited  (the
"Company")  on the Form 40-F for the fiscal year ending  December  31, 2005 as
filed with the  Securities  and  Exchange  Commission  on the date hereof (the
"Report"),  I,  Douglas  A.  Proll,  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 29th day of March, 2006.


/s/ Douglas A. Proll
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Douglas A. Proll
Chief Operating Officer and Senior Vice-President,
Finance (Principal Financial Officer),
Canadian Natural Resources Limited