Frans schrijversduo bestaande uit Pierre Louis Boileau en Thomas Narcejac.
Boileau-Narcejac is the nom de plume by which French crime fiction writers Pierre Boileau (28 April 1906 – 16 January 1989) and Pierre Ayraud, aka Thomas Narcejac (3 July 1908 – 9 June 1998) collaborated. A number of their publications were adapted for cinema, including Celle qui n'était plus, as Les Diaboliques (1955), directed by Henri-Georges Clouzot, and D'entre les morts, as Vertigo (1958), directed by Alfred Hitchcock.  They also notably adapted the novel Les yeux sans visage by Jean Redon into the horror movie known in English as Eyes Without a Face (1960).
Individually, Boileau and Narcejac were each winners of the prestigious Prix du Roman d'Aventures, awarded each year to the best work of detective fiction, French or foreign: Boileau for Le Repos de Bacchus during 1938 and Narcejac for La Mort est du Voyage during 1948, each a so-called locked-room mystery.
The pair met during 1948 at the award dinner for Narcejac, to which Boileau—as a prior winner—had also been invited. Their collaboration began soon afterward, with Boileau providing the plots and Narcejac the atmosphere and characterisation, not unlike Frederic Dannay and Manfred Lee (“Ellery Queen”).