**Exhibit 31.2**

**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-Q/A of Alcan amending the quarterly report on    Form 10-Q for the quarterly period ended March 31, 2003 of Alcan (the Form    10-Q, 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-Q, 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 |
|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|