Exhibit 23 to Annual Report

On Form 10-K

for Fiscal Year Ended June 30, 2021

By Parker-Hannifin Corporation

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-236292 on Form S-3; and Registration Statement Nos. 333-236293, 333-117761, 333-126957, 333-186733, 333-186734, 333-192909, 333-201071 and 333-215107 on Form S-8 of our report dated August 25, 2021, relating to the financial statements and the financial statement schedule of Parker-Hannifin Corporation and subsidiaries (the “Company”), and the effectiveness of the Company’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of the Company for the year ended June 30, 2021.

/s/ DELOITTE & TOUCHE LLP

Cleveland, Ohio

August 25, 2021