EXHIBIT 23 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the registration statements on Form S-8 (File Nos. 2-91432, 2-72124, 2-85698, 2-97280, 33-37319, 33-37323, 33-59005, 33-10801, 33-11790, 333-79227, 333-90127) on Form S-3 (File Nos. 2-84252, 33-9706, 33-22196, 33-47213, 333-23025) on Form S-3/A (File No. 333-80781) and on Form S-4 (File No. 33-58117) of Millipore Corporation of our report dated January 20, 1999, except for Note B, for which the date is November, 12, 1999 relating to the financial statements, which is incorporated in this Annual Report on Form 10-K/A. Boston, Massachusetts November 12, 1999 /s/ PriceWaterhouseCoopers LLP