Club Deportivo Básico Balonmano Aragón, is a handball team based in Zaragoza, Aragón, Spain. Caja3 Aragón currently plays in Liga ASOBAL. The team was known as CAI Aragón in 2010–11 season and as Caja3 Aragón in 2011–12 season.
After the 2004-05 season, the team was promoted from Honor Division B to Liga ASOBAL. The manager was Fernando Bolea and the president, Ricardo Arregui, who reached the club in 2003.
For the 2011–12 season, the team will known as Caja3 Aragón due to sponsorship of Caja3. This sponsorhip was cancelled following 2011–12 season due to financial problems of Caja3.