1990 PBA First Conference finals

The 1990 PBA First Conference finals was the best-of-seven basketball championship series of the 1990 PBA First Conference, and the conclusion of the conference's playoffs. Formula Shell Zoom Masters and Añejo Rum 65ers played for the 45th championship contested by the league.

Formula Shell took home its first PBA title by winning their series against Añejo Rum 65ers, four games to two. Game Six resulted in a tumultuous ending as the 65ers walked off of the playing court with 2:52 left in the second quarter and the Zoom Masters on top, 62–47. Añejo paid a total fine of P550,000.