1983–84 Yugoslav First Basketball League

Teams placed 1st to 6th at the end of the regular season automatically qualified for the playoffs quarterfinal round.

The remaining two spots for the playoffs quarterfinal round were determined through a four-team play-in.

The 7th and 8th-placed teams had to play a single-game round against the Second League 2nd and 1st-placed teams, respectively, that managed to gain promotion for the next season's top league competition.

The winners of each respective game qualified for the playoffs quarterfinal.

Cibona-Radnički 101–88, 89–91, 101–89 Crvena zvezda-Partizan 93–79, 90–88 Zadar-Borac Čačak 91–83, 118–97 Šibenka-Bosna 88–94, 68–84