| 1958–59 FIBA European Champions Cup | |
| League: | FIBA European Champions Cup |
| Sport: | Basketball |
| Finals: | Finals |
| Finals Link: | 1959 FIBA European Champions Cup Finals |
| Finals Champ: | Rīgas ASK |
| Finals Runner-Up: | Academic |
| Seasonslistnames: | FIBA European Champions Cup |
| Prevseason Link: | 1958 FIBA European Champions Cup |
| Prevseason Year: | 1958 |
| Nextseason Year: | 1959–60 |
| Nextseason Link: | 1959–60 FIBA European Champions Cup |
The 1958–59 FIBA European Champions Cup' was the second season of the European top-tier level professional basketball club competition FIBA European Champions Cup (now called EuroLeague). It was won by Rīgas ASK for the second straight time, after they again beat Academic, in both EuroLeague Finals games (79–58 & 69–67). Riga defeated Lech Poznań in the semifinals, and Honvéd in the quarterfinals.
21 teams. European national domestic league champions, plus the then current FIBA European Champions Cup title holders only, playing in a tournament system. The Finals were a two-game home and away aggregate.
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