UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                           _________________________

                                   FORM 8-K

                                CURRENT REPORT


               Pursuant to Section 13 or 15(d) of the Securities
                             Exchange Act of 1934

                           _________________________

      Date of Report (date of earliest event reported):  OCTOBER 21, 2004


                       WAUSAU-MOSINEE PAPER CORPORATION
            (Exact name of registrant as specified in its charter)


         WISCONSIN                  1-13923                   39-0690900
      (State or other          (Commission File              (IRS Employer
      jurisdiction of               Number)                 Identification
      incorporation)                                            Number)

                                100 PAPER PLACE
                            MOSINEE, WI 54455-9099
         (Address of principal executive offices, including Zip Code)

                                (715) 693-4470
             (Registrant's telephone number, including area code)


      Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

   *  Written communications pursuant to Rule 425 under the Securities Act (17
      CFR 23.425)
   
   *  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17
      CFR 240.14a-12)
   
   *  Pre-commencement communications pursuant to Rule 14d-2(b) under the
      Exchange Act (17 CFR 240.14d-2(b))
   *  Pre-commencement communications pursuant to Rule 13e-4(c) under the
      Exchange Act (17 CFR 240.13e-4(c))

                   INFORMATION TO BE INCLUDED IN THE REPORT


SECTION 8 - OTHER EVENTS

ITEM 8.01   OTHER EVENTS

      On October 21, 2004, the Company announced that it had acquired the
assets of Missota Paper Company, LLC, including its Brainerd, Minnesota, paper
mill, for approximately $9.6 million.  The assets will become part of Wausau
Paper's Printing & Writing business segment.  The Brainerd mill consists of two
paper machines and associated finishing equipment capable of producing
approximately 170,000 tons per year of uncoated freesheet paper.  The Company
plans to start the mill's largest paper machine in mid-November.  The machine
is capable of producing 90,000 ton per year of premium printing and writing
paper.  No timetable has been established for the start-up of the mill's second
paper machine.

      This report contains certain of management's expectations and other
forward-looking information regarding the Company pursuant to the safe-harbor
provisions of the Private Securities Litigation Reform Act of 1995.  While the
Company believes that these forward-looking statements are based on reasonable
assumptions, such statements are not guarantees of future performance, and all
such statements involve risk and uncertainties that could cause actual results
to differ materially from those contemplated in this report.  The Company's
expectations with respect to the future operation at the Brainerd mill include
the assumptions, risks, and uncertainties relating to general economic and
business conditions, changes in the prices and supply of raw materials or
energy, competitive pricing in the markets served by the Company as a result of
economic conditions, overcapacity in the industry, and the demand for paper
products.  These and other assumptions, risks, and uncertainties are described
under the caption "Cautionary Statement Regarding Forward-Looking Information"
in Item 1 of the Company's Annual Report on Form 10-K for the year ended
December 31, 2003, and from time to time, in the Company's other filings with
the Securities and Exchange Commission.  The Company assumes no obligation to
update or supplement forward-looking statements that become untrue because of
subsequent events.


SECTION 9 - FINANCIAL STATEMENTS AND EXHIBITS

ITEM 9.01   FINANCIAL STATEMENTS AND EXHIBITS

      Exhibit 99.1  Press release dated October 21, 2004

                                  SIGNATURES


      Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                    WAUSAU-MOSINEE PAPER CORPORATION



Date:  October 21, 2004             By:    SCOTT P. DOESCHER
                                           Scott P. Doescher
                                           Senior Vice President-Finance




                                 EXHIBIT INDEX
                                      TO
                                   FORM 8-K
                                      OF
                       WAUSAU-MOSINEE PAPER CORPORATION
                            DATED OCTOBER 21, 2004
                 Pursuant to Section 102(d) of Regulation S-T
                        (17 C.F.R. Section 232.102(d))




99.1  PRESS RELEASE DATED OCTOBER 21, 2004