1 EXHIBIT 23.1 CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-65977, 333-65979, 333-65983, 333-65985, 333-69253, 333-80953, 333-80955, 333-80957, 333-80951, 333-80959) and on Form S-3 (No. 333-88573) of Conoco Inc. of our report dated February 19, 2001 relating to the financial statements, which appears in this Current Report on Form 8-K. PRICEWATERHOUSECOOPERS LLP Houston, Texas February 21, 2001