Heads or Tails (French: Pile ou face) is a Canadian sex comedy film, directed by Roger Fournier and released in 1971. The film centres on a group of friends who live in various places around the world and see each other once a year when they gather for a swingers weekend, but whose social equilibrium is upended when one of the circle cancels, sending in her place Stéphanie (Nathalie Naubert), a woman who is unwilling to participate in their sex games.

The cast includes Diane Arcand, Jean Coutu, Patricia Foster, Monique Bélisle, Jean-Denis Leduc, Jérôme Tiberghien, Jacqueline Fellay, Patrick Peuvion, Georges Carrère and Claudia Hen.