The Birthday Massacre (abbreviated TBM) is a Canadian synthrock band, formed in 1999 in London, Ontario, and currently based in Toronto, Ontario. The current line-up consists of Chibi (vocals), Falcore (guitars), Rainbow (guitars), Owen (synthesizers), Nate Manor (bass guitar) and Rhim (drums).

When the band formed in 1999, they were known as Imagica. This name was inspired from the fantasy novel Imajica (1991) by Clive Barker. In 2002, they changed the name to The Birthday Massacre in order to avoid confusion with another group.