Holy Diver is the debut studio album by the American heavy metal band Dio, released in 1983. The album was acclaimed by the music press and is the band’s most successful album.

Released on May 25, 1983, the album has been hailed by critics as Dio’s best work and a classic staple in the heavy metal genre. The album was certified gold in the US on September 12, 1984, and platinum on March 21, 1989. In the UK it attained Silver certification (60,000 units sold) by the British Phonographic Industry, achieving this in January 1986, at the same time as The Last in Line.

The original vinyl release had a photomontage LP-liner, with images from both Rainbow and Black Sabbath days.

The album was remastered and re-released by Rock Candy Records in 2005.

The only notable addition to the original album is an audio interview with Ronnie James Dio. Tracks 10–19 on the 2005 edition are Dio’s answers to various questions about the album. The questions are not posed during the interview itself, but can be found inside the CD’s booklet instead. The album, along with The Last in Line and Sacred Heart, were released in a new two-CD deluxe edition on March 19, 2012 through Universal for worldwide distribution outside the U.S.

“Caught in the Middle” shares the main guitar riff with Campbell’s previous band Sweet Savage‘s song “Straight Through the Heart” (1983), whose title was used for another song in this album.