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: October 27, 2004

                                  PLEXUS CORP.
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             (Exact name of registrant as specified in its charter)

        Wisconsin                  000-14824                  39-1344447
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(State or other jurisdiction     (Commission               (I.R.S. Employer
    of incorporation)             File Number             Identification No.)

55 Jewelers Park Drive, Neenah, Wisconsin           54957-0156
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(Address of principal executive offices)            (Zip Code)



               Registrant's telephone number, including area code:
                                 (920) 722-3451

     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 (see General Instruction A.2. below):

[ ]  Written communications pursuant to Rule 425 under the Securities Act
     (17 CFR 230.425)

[ ]  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))







Item 2.02. Results of Operations and Financial Condition.

On October 27, 2004, Plexus Corp. announced its results for the fourth quarter
and fiscal year ended September 30, 2004. A copy of Plexus' related press
release is furnished to the Commission by attaching it as Exhibit 99.1 to this
report.

                                    * * * * *

                                   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.



Date:  October 27, 2004                     PLEXUS CORP.
                                            (Registrant)

                                            By: /s/ F. Gordon Bitter
                                                --------------------------------
                                                F. Gordon Bitter
                                                Chief Financial Officer


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