The Brian Jonestown Massacre (frequently abbreviated as BJM or The BJM) is a psychedelic rock band founded in San Francisco, California in the early 1990s, led by Anton Newcombe. They are now most famous for their role in the 2004 documentary DiG!, which details their explosive onstage antics and their feud with fellow '60's psych-rock revivalists The Dandy Warhols. The band is currently based in New York City.

Over its decade-long history, the band has undergone a large number of personnel changes. Multi-instrumentalist and main songwriter Anton Newcombe is the only member who has stayed with the Brian Jonestown Massacre since its beginning, when it was founded by Newcombe, tambourine player Joel Gion (who stayed with him the longest), and guitarist/bassist/vocalist Matt Hollywood. There are at least two dozen musicians who have been in the BJM at one point or another.

Ex-members include: guitarist Jeff Davies; guitarist Reginald Shumway; Matt Hollywood, a founding member of Portland band The Out Crowd; Peter Hayes, founding member of San Francisco rock trio Black Rebel Motorcycle Club; Sam Wightman; Joel Gion, a founding member of San Francisco band, The Dilettantes; Rob Campanella, a Los Angeles studio producer and engineer who has worked with The Tyde, Beachwood Sparks, Dead Meadow, Mia Doi Todd, Frausdots, Scarling., and his band The Quarter After; Bobby Hecksher, founding member of Los Angeles band The Warlocks; solo recording artist Miranda Lee Richards; Matt Tow, founding member of Australia's answer to the BJM, The Lovetones.

The BJM's track, "When Jokers Attack" from And This is Our Music is featured on the 2003 Shut Eye Records release, Buzzlighter #7: Low Tones to Lullaby Town.