The 1973–74 FIBA Korać Cup was the third edition of FIBA's new competition, running from 6 November 1973 to 11 April 1974. It was contested by 37 teams, twenty-five more than in the previous edition.
Birra Forst Cantù defeated Partizan in the final to become the competition's first back-to-back champion.
*Originally, AEK and 1.FC Bamberg were drawn to play against the Israeli teams Hapoel Tel Aviv and Maccabi Ramat Gan, respectively, but FIBA cancelled these match-ups and declared the former clubs winners.
**Soma Wien withdrew before the first leg and HAN Thessaloniki received a forfeit (2–0) in both games.