Club Baloncesto Zaragoza is a basketball team based in Zaragoza, Aragón, who played from 1981 to 1996 in the top Spanish league (Liga ACB since 1983) and now plays in the 1ª División, the fifth tier.

The club was founded in 1981 with the purpose of having an elite team in the city of Zaragoza with sufficient resources to play in the 1ª División.

The second Copa del Rey arrived in 1990, when CAI Zaragoza beat Ram Joventut 76–69 in the Centro Insular de Deportes at Las Palmas.

Later, in 1996, due to financial problems, CB Zaragoza sold their Liga ACB berth and the FIBA Korać Cup spot to CB Granada and the senior team was folded.

In 2001 the senior team returned to Liga EBA but only played two years.