First Men's Basketball League (Croatian: Prva muška liga) is the is a 2nd-tier men's professional basketball competitions in Croatia. The league was founded in 2017 replacing the A2 Basketball League.
|Level on pyramid||2nd|
|Promotion to||HT Premijer liga|
League champions are promoted to HT Premijer Liga and runners-up are playing playoffs with 11th placed team from HT Premijer Liga.
|2019–20||Canceled due to the COVID-19 pandemic|
|2020–21||Cedevita Junior||Dinamo Zagreb|
The following is the list of clubs for the 2021–22 season.
- "Goran Gunjević: Prva liga će biti poprilično zahtjevna | Crosarka.com". Crosarka.com - Nezavisni hrvatski košarkaški portal. 2017-10-03. Retrieved 2020-11-29.
- "Prva Liga (Season 2021-2022)". Retrieved 24 November 2021.