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U.S.SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 

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Form 40-F 
[Check one] 
[ ]**REGISTRATION STATEMENT PURSUANT TO SECTION 12 OF THE** **SECURITIES EXCHANGE ACT OF 1934**   **OR  [X]**ANNUAL REPORT PURSUANT TO SECTION 12(a) OR 15 (d) OF THE** **SECURITIES EXCHANGE ACT OF 1934**    For the      fiscal year ended December 31, 2003.Commission      File No. 1-13056
 
 **CAMBIOR INC.**(Exact name of Registrant as specified in      its charter) Not Applicable(Translation of Registrant's name into      English (if applicable)) Province of Québec, Canada(Province or other jurisdiction of      incorporation or organization) 1041(Primary Standard Industrial Classification      Code Number (if applicable)) Not Applicable(I.R.S. Employer Identification Number (if      applicable)) 1111 St.      Charles Street West, East Tower, Suite 750Longueuil, Québec, Canada      J4K 5G4 (450) 677-0040(Address and telephone number of      Registrant's principal executive offices) RL&F Service Corp.One Rodney Square, 10th      Floor10th and King StreetsWilmington, DE 19801Telephone: (302)      651-7642Attention: Mark J. Gentile(Name, address (including zip code) and      telephone number(including area code) of      agent for service in the United States)
Securities registered or to be registered pursuant to Section12(b) of the Act. 
Title of      each className of      each exchange on which registered  Common      Shares, no par valueAmerican      Stock Exchange
Securities registered or      to be registered pursuant to Section 12(g) of the Act. None(Title of Class) Securities for which there is a reporting      obligation pursuant to Section 15(d) of the Act.None 
For annual reports, indicate by check mark the      information filed with this Form:  [X] Annual      Information Form[ ] Audited      annual financial statements        Indicate the number of outstanding shares of each of the issuer's classes      of capital or      common stock as of the close of the period covered by the annual report.  
December 31, 2003: 240,842,171  
Indicate by check whether the Registrant by filing the  information contained in this Form is also thereby furnishing the information  to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act  of 1934 (the "Exchange Act"). If "Yes" is marked, indicate the filing number  assigned to the Registrant in connection with such Rule. 

Yes ___            No    X     

Indicate by check mark whether the Registrant (1) has filed  all reports required to be filed by Section 13 or 15(d) of the Exchange Act  during the preceding 12 months (or for such shorter period that the Registrant  was required to file such reports) and (2) has been subject to such filing  requirements for the past 90 days. 

Yes    X               No ____

UNDERTAKING AND CONSENT TO SERVICE OF PROCESS 
**Item 1. Undertaking.

Registrant undertakes to make available, in person or bytelephone, representatives to respond to inquiries made by the Commission staff,and to furnish promptly, when requested to do so by the Commission staff,information relating to: the securities registered pursuant to Form 40-F; thesecurities in relation to which the obligation to file an annual report on Form40-F arises; or transactions in said securities. 
**Item 2. Consent to Service of Process.

Registrant filed with the Commission a written irrevocable consent and powerof attorney on Form F-X on April 26, 1994. 

Material included in this Form 40-F: 
- Annual Information Form for the year ended December 31, 2003;   
- Management's Discussion and Analysis of financial condition and results of  operation included in the Annual Report for the year ended December 31, 2003;   
- Audited Consolidated Financial Statements for the year ended December 31,  2003 together with the Auditors' report thereon;   
- Information Circular provided in connection with the solicitation of  proxies by the management of Cambior Inc. for use at the Annual General  Meeting of Shareholders held on May 12, 2004.  

Disclosure controls and procedures are defined by theSecurities and Exchange Commission as those controls and procedures that aredesigned to ensure that information required to be disclosed in our filingsunder the Securities Exchange Act of 1934 is recorded, processed, summarized andreported within the time periods specified in the Securities and ExchangeCommission rules and forms. Our Chief Executive Officer and Chief FinancialOfficer have evaluated our disclosure controls and procedures within 90 daysprior to filing this Annual Report on Form 40-F and have determined that suchdisclosure controls and procedures are effective. 

Subsequent to our evaluation, there were no significantchanges in internal controls or other factors that could significantly affectinternal controls, including any corrective actions with regards to significantdeficiencies and material weaknesses. 

The design of any system of controls and procedures is basedin art upon certain assumptions about the likelihood of future events. There canbe no assurance that any design will succeed in achieving its stated goals underall potential future conditions, regardless of how remote. 

 
**LIST OF EXHIBITS 

The following documents are attached to this Form 40-F:**
Exhibit 31.1   Certification of Louis P. Gignac, President andChief Executive Officer, pursuant to Section 302 of the Sarbane-Oxley Act of2002; 

Exhibit 31.2   Certification of Bryan A. Coates, Vice Presidentand Chief Financial Officer, pursuant to Section 302 of the Sarbane-Oxley Act of2002; 

Exhibit 32.1   Certification of Louis P. Gignac, President andChief Executive Officer, pursuant to Section 906 of the Sarbane-Oxley Act of2002; 

Exhibit 32.2   Certification of Bryan A. Coates, Vice Presidentand Chief Financial Officer, pursuant to Section 906 of the Sarbane-Oxley Act of2002. 

SIGNATURES 

Pursuant to the requirements of the Exchange Act, theRegistrant certifies that it meets all of the requirements for filing on Form40-F and has duly caused this annual report to be signed on its behalf by theundersigned, thereto duly authorized. 
Registrant Cambior Inc.  By */s/      Lucie Desjardins* Lucie Desjardins, Corporate Secretary  Date May 17, 2004******