Holy Diver is the debut studio album by the American heavy metal band Dio, released in 1983. Vocalist Ronnie James Dio had just finished his first tenure in Black Sabbath, whose drummer, Vinny Appice, he took with him to put together his own band. The roster was completed by his former bandmate from Rainbow, Jimmy Bain, on bass and by the young guitarist Vivian Campbell, coming from the new wave of British heavy metal band Sweet Savage. The album was acclaimed by the music press and is the band's most successful effort.