Treason is the fifth album by progressive rock band, Gryphon, originally released in 1977 by Harvest, catalogue number SHSP 4063. It would be their last album for over 40 years.
Following the departure of guitarist Graeme Taylor and bassist Malcolm Bennett after the release of Raindance, Gryphon recruited and Jonathan Davie to replace them respectively. Alex Baird was also hired as the band's new drummer so previous drummer David Oberlé could focus on lead vocals. The album was also made in collaboration with lyricist Tim Sebastion.