No Exit (French: Huis clos, pronounced [ɥi klo]) is a 1944 existentialist French play by Jean-Paul Sartre. The play was first performed at the Théâtre du Vieux-Colombier in May 1944. The play begins with three characters who find themselves waiting in a mysterious room. It is a depiction of the afterlife in which three deceased characters are punished by being locked into a room together for eternity. It is the source of Sartre's especially famous phrase "L'enfer, c'est les autres" or "Hell is other people", a reference to Sartre's ideas about the look and the perpetual ontological struggle of being caused to see oneself as an object from the view of another consciousness.

English translations have also been performed under the titles In Camera, No Way Out, Vicious Circle, Behind Closed Doors, and Dead End. The original title, Huis clos ("closed door"), is the French equivalent of the legal term in camera (Latin: "in a chamber"), referring to a private discussion behind closed doors.