Arief Hidayat (born 3 February 1956) was the fifth Chief Justice of the Constitutional Court of Indonesia. Previously, he was a professor of law at his alma mater, Diponegoro University. In January 2017, Hidayat led an investigation of his colleagues relating to a graft scandal on the court. Hidayat cleared the names of two of his fellow justices, I Dewa Gede Palguna and Manahan Sitompul, but discovered evidence that led to the dismissal of (former) fellow justice Patrialis Akbar.