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 Martin D. Madaus, 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, 2006, 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/    MARTIN D.
MADAUS Martin D. Madaus         |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    DANIEL
BELLUS Daniel Bellus               |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    ROBERT C.
BISHOP Robert C. Bishop         |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    MELVIN D.
BOOTH Melvin D. Booth           |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    ROBERT C.
BISHOP Robert C. Bishop         |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    ROLF
CLASSON Rolf Classon                 |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    MAUREEN A.
HENDRICKS Maureen A. Hendricks |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    MARK
HOFFMAN Mark Hoffman                 |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    JOHN F.
RENO John F. Reno                 |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    EDWARD M.
SCOLNICK Edward M. Scolnick     |  | Director |  | February 15, 2007
|                                                 |  |         
|/S/    KAREN E.
WELKE Karen E. Welke             |  | Director |  | February 15, 2007