Exhibit 24.1



POWER OF ATTORNEY



KNOW ALL MEN BY THESE PRESENTS, that the undersigned Directors and Officers of Millipore Corporation (the Corporation), do hereby constitute
and appoint Francis J. Lunger, Kathleen Allen and Jeffrey Rudin and each of them individually, their true and lawful attorneys and agents to execute on behalf of the Corporation the Form 10-K Annual Report of the Corporation for the fiscal year
ended December 31, 2003, and all such amendments or additional instruments related thereto which such attorneys and agents may deem to be necessary and desirable to enable the Corporation to comply with the requirements of the Securities Exchange
Act of 1934, as amended, and any regulations, orders, or other requirements of the United States Securities and Exchange Commission thereunder in connection with the preparation and filing of said documents, including specifically, but without
limitation of the foregoing, power and authority to sign the names of each of such Directors and Officers on his behalf, as such Director or Officer, as indicated below to the said Form 10-K Annual Report or documents filed or to be filed as a part
of or in connection with such Form 10-K Annual Report; and each of the undersigned hereby ratifies and confirms all that said attorneys and agents shall do or cause to be done by virtue thereof.



|                                             |  |                       |  |                  
|-------------------------------------------- |  | --------------------- |  | -----------------
|SIGNATURE                                    |  | TITLE                 |  | DATE             
|                                             |  |                      
|/s/ Francis J. LungerFrancis J. Lunger       |  | Chairman and Director |  | February 12, 2004
|                                             |  |                      
|/s/ Daniel BellusDaniel Bellus               |  | Director              |  | February 12, 2004
|                                             |  |                      
|/s/ Robert C. BishopRobert C. Bishop         |  | Director              |  | February 12, 2004
|                                             |  |                      
|/s/ Maureen A. HendricksMaureen A. Hendricks |  | Director              |  | February 12, 2004
|                                             |  |                      
|/s/ Mark HoffmanMark Hoffman                 |  | Director              |  | February 12, 2004



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Power of Attorney



|                                         |  |          |  |                  
|---------------------------------------- |  | -------- |  | -----------------
|SIGNATURE                                |  | TITLE    |  | DATE             
|                                         |  |         
|/s/ Richard J. LaneRichard J. Lane       |  | Director |  | February 12, 2004
|                                         |  |         
|/s/ John F. RenoJohn F. Reno             |  | Director |  | February 12, 2004
|                                         |  |         
|/s/ Edward M. ScolnickEdward M. Scolnick |  | Director |  | February 12, 2004
|                                         |  |         
|/s/ Karen E. WelkeKaren E. Welke         |  | Director |  | February 12, 2004