Exhibit 31.1

CERTIFICATION

 

I, Travis Engen, President and Chief Executive Officer ofAlcan Inc. ("Alcan"), certify that:

| 1.     | I have reviewed this quarterly report on Form 10-Q of Alcan;                                                                                                                                                                                                                                                   |
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| 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; |
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| 3.     | Based on my knowledge, the financial statements, and  other financial information included in this report, fairly present in all  material respects the financial condition, results of operations and cash  flows of the registrant as of, and for, the periods presented in this report;                     |
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| 4.     | The registrant's other certifying officers and I are  responsible for establishing and maintaining disclosure controls and  procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for the  registrant and have:                                                                                |
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|   | a)                                                                                                                                                                                                                                                                                                             | Designed such disclosure controls and procedures, or caused such  disclosure controls and procedures to be designed under our supervision, to  ensure that material information relating to the registrant, including its  consolidated subsidiaries, is made known to us by others within those  entities, particularly during the period in which this report is being  prepared; |
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|   | b)                                                                                                                                                                                                                                                                                                             | Evaluated the effectiveness of the registrant's disclosure controls and    procedures and presented in this report our conclusions about the    effectiveness of the disclosure controls and procedures, as of the end of    the period covered by this report based on such evaluation; and |
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|   | c)                                                                                                                                                                                                                                                                                                             | Disclosed in this report any change in the registrant's internal control    over financial reporting that occurred during the registrant's most recent    fiscal quarter that has materially affected, or is reasonably likely to    materially affect, the registrant's internal control over financial    reporting; and |
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| 5.     | The registrant's other certifying officers and I have disclosed, based on    our most recent evaluation of internal control over financial reporting, to    the registrant's auditors and the audit committee of registrant's board of    directors (or persons performing the equivalent function):           |
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|   | a)                                                                                                                                                                                                                                                                                                             | All significant deficiencies and material weaknesses in the design or  operation of internal control over financial reporting which are reasonably  likely to adversely affect the registrant's ability to record, process,  summarize and report financial information; and |
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|   | b)                                                                                                                                                                                                                                                                                                             | Any fraud, whether or not material, that involves management or other    employees who have a significant role in the registrant's internal control    over financial reporting.    Date:May 10,****2004    /s/ Travis Engen      Travis Engen                            President and Chief Executive Officer
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