exv31w1

Exhibit 31.1

CERTIFICATION

I, Bruce Aitken, certify that:

1. I have reviewed this annual report on Form 40-F/A of Methanex Corporation; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: April 19, 2005

/s/ BRUCE AITKEN
Bruce Aitken
President and Chief Executive Officer

1.	I have reviewed this annual report on Form 40-F/A of Methanex Corporation; and

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.


Date: April 19, 2005

	/s/ BRUCE AITKEN
	Bruce Aitken
	President and Chief Executive Officer