**Exhibit 31.1**

**Certification**

I, Geoffery E. Merszei, Executive Vice President and Chief Financial Officerof Alcan Inc. ("Alcan"), certify that: 

| 1. | I have reviewed this amendment to report on Form 10-K/A    of Alcan amending the annual report on Form 10-K for the fiscal period ended    December 31, 2002 of Alcan (the Form 10-K, as amended by this amendment to    report, the "Report");2. 
Based on my knowledge, the 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 the Report; 3.
Based on my knowledge, the financial statements, and    other financial information included in the 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 the Report;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 we have:  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 the Report is    being prepared;  b) 
Evaluated the effectiveness of the registrant's    disclosure controls and procedures and presented in the Report our    conclusions about the effectiveness of the disclosure controls and    procedures, as of a date within 90 days prior to the filing date of the Form    10-K, based on such evaluation; and  c) 
Disclosed in the 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 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):  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  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: September 11, 2003    /s/ Geoffery E.    Merszei   
    Geoffery E. Merszei 

    Executive Vice President and Chief Financial Officer |
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