The 2004–05 Euroleague was the fifth season of the professional basketball competition for elite clubs throughout Europe, organised by Euroleague Basketball Company, and it was the 48th season of the premier competition for European men's clubs overall. The 2004–05 season featured 24 competing teams, from 13 countries. The final of the competition was held in Olimpiisky Arena, Moscow, Russia, with the defending champions, Maccabi Tel Aviv, defeating Tau Cerámica by a score of 90-78.

Olympic Stadium was an indoor arena located in Moscow, Russia. It was built for the 1980 Summer Olympics and, divided into two separated halls, hosted the basketball and boxing events. It was closed in March 2019, and was subsequently demolished in 2020 for the construction of a new complex.