"Suicide Is Painless" (also known as "Theme from M*A*S*H" or "Song from M*A*S*H") is a song written by Johnny Mandel (music) and Michael Altman (lyrics) for the 1970 film M*A*S*H. In addition to being performed by characters in the film, it plays during the title sequence as sung by The Ron Hicklin Singers.

An instrumental version was used as the theme music for the TV series based on the film, playing over the opening and closing credits.

The song was written for Ken Prymus, the actor playing Private Seidman, to sing during the faux-suicide of Walter "Painless Pole" Waldowski (John Schuck) in the film's "Last Supper" scene.

Altman said that, while he only made $70,000 for directing the movie, his son had earned more than $1 million for co-writing the song.

7″ vinyl Welsh alternative rock band Manic Street Preachers released a cover version of "Suicide Is Painless" on September 7, 1992, as "Theme from M.A.S.H.