Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of Plexus Corp. of our report dated November 19, 2007, relating to the financial statements, the financial statement schedule and the effectiveness of internal control over financial reporting which appears in Plexus Corp.’s Annual Report on Form 10-K for the fiscal year ended September 29, 2007.

/s/ PricewaterhouseCoopers LLP  

PricewaterhouseCoopers LLP 

Milwaukee, Wisconsin
May 16, 2008