Eurocup Basketball (also known as the ULEB Eurocup and previously known as the ULEB Cup from 2002–2008) is the second-tier level transnational professional basketball competition in Europe, below only the Turkish Airlines Euroleague. It is composed of teams from European domestic national leagues that are part of the ULEB (a French acronym for "Union of European Basketball Leagues"), and that do not have a contract to compete in the Euroleague.

Teams qualify for the competition merely based on their performance in their national league and cup competition. The Eurocup was created in 2002, and can be considered as a fusion between the defunct FIBA Korać Cup and Saporta Cup competitions.

The winners of the competition are invited to participate in the next season's Turkish Airlines Euroleague, the highest tier of European basketball. The qualifying rounds of each season's Eurocup, are run and controlled by FIBA Europe. Each season's Eurocup qualifying round games are a part of the FIBA EuroChallenge competition, and are counted as official games played in that competition.