The Margin (French: La Marge) is a novel by André Pieyre de Mandiargues published in 1967, which won the Prix Goncourt the same year. It was first published in the UK as The Margin in 1970, translated by R. Howard.
Sigismond, a married man with a son, takes a business trip to Paris and falls under the spell of a beautiful prostitute that resembles his wife.
The novel was adapted into a film in 1976 directed by Walerian Borowczyk as La Marge, internationally as The Margin and in the UK as The Streetwalker.