1989–90 FIBA European Cup Winner's Cup

The 1989–90 FIBA European Cup Winner's Cup was the twenty-fourth edition of FIBA's competition for European basketball national cup champions, running from 26 September 1989 to 13 March 1990. It was contested by 21 teams, the same number of teams as the previous edition.

Knorr Bologna defeated Real Madrid in a final held in Florence, winning its first European title. It had previously lost the 1977-78 final against Gabetti Cantù.