| Nextseason: | 2018–19 |
| Extraliga | |
| T Bg: |
|
| T Color: | white |
| Season: | 2017–18 |
| Champions: | Levickí Patrioti (2nd title) |
| Runners Up: | Košice |
| Third Place: | Inter Bratislava |
| Fourth Place: | MBK Rieker Komarno |
| Teams: | 10 |
The 2017–18 Slovak Basketball League season was the 26th season of the top-tier basketball competition in Slovakia. Inter Bratislava was the defending champion, but was eliminated in the semifinals. Levickí Patrioti won their second league.
Ten teams joined the regular season, consisted in playing against each other four times home-and-away in double a round-robin format. The eight first qualified teams advance to the playoffs.
Lučenec and SPU Nitra did not continue in the Extraliga. Žilina, champion of the 1.Liga, replaced them.
| Team | City | Arena | |
|---|---|---|---|
| Športová Hala | |||
| Hant Aréna | |||
| Iskra Aréna | |||
| Niké Aréna | |||
| Mestská športová hala | |||
Seeded teams played games 1, 3, 5 and 7 at home. Quarterfinals were played in a best-of-five games format while semifinals and final with a best-of-seven one.
| Team | Competition | Progress | |
|---|---|---|---|
| bgcolor=#C0C0C0 | Runners-up | ||
| Regular season | |||
| Rieker Com Therm Komarno | Regular season | ||