José Antonio Querejeta Altuna (born 19 March 1957), known as Josean Querejeta, is a retired basketball player of Saski Baskonia, Real Madrid, Joventut Badalona and CAI Zaragoza, and the current president of Vitoria-Gasteiz-based Saski Baskonia since 1988, following the conversion of the club into a S.A.D.
From 2013 his Avtibask S.L. group also held a controlling stake in the city's football club Deportivo Alavés.
In October 2025, he was fined after he went outside the referee's locker room to confront them during halftime of the game against Panathinaikos B.C. and he was fined for committing acts representing a lack of respect against the officiating crew.