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|   | **CERTIFICATIONS**EXHIBIT 31.1
I, Louis P. Gignac, certify that: 

1. I have reviewed this report on Form 40-F of Cambior Inc.(the "Company"); 

2. Based on my knowledge, this report does notcontain any untrue statement of a material fact or omit to state a material factnecessary to make the statements made, in light of the circumstances under whichsuch statements were made, not misleading with respect to the period covered bythis report; 

3. Based on my knowledge, the financialstatements, and other financial information included in this report, fairlypresent in all material respects the financial condition, results of operationsand cash flows of the Company as of, and for, the periods presented in thisreport; 

4. The Company's other certifying officer andI are responsible for establishing and maintaining disclosure controls andprocedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) for theCompany and 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  Company, 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; 

(b) evaluated the effectiveness of the  Company'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 

(c) disclosed in this report any change in  the Company's internal control over financial reporting that occurred during  the period covered by the annual report that has materially affected, or is  reasonably likely to materially affect, the Company's internal control over  financial reporting; and 

5. The Company's other certifying officer andI have disclosed, based on our most recent evaluation of internal control overfinancial reporting, to the Company's auditors and the audit committee of theCompany's board of directors (or persons performing the equivalent functions):

(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  Company'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  Company's internal controls over financial reporting. 

Date: May 17, 2004       

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 /*s/    Louis P. Gignac* Louis P. GignacPresident and Chief Executive    OfficerCambior Inc.**** |
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