EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-231090 on Form S-3 and Registration Statement No. 333-211150 on Form S-8 of our report dated February 11, 2020, relating to the consolidated financial statements and financial statement schedules of CNA Financial 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 December 31, 2019.

/s/ DELOITTE & TOUCHE LLP

Chicago, Illinois

February 11, 2020