Paul Joseph Schrader (/ˈʃreɪdər/; born July 22, 1946) is an American screenwriter, film director, and film critic. He first became known for writing the screenplay of Martin Scorsese's Taxi Driver (1976). He later continued his collaboration with Scorsese, writing or co-writing Raging Bull (1980), The Last Temptation of Christ (1988), and Bringing Out the Dead (1999). Schrader has also worked extensively as a director: his 23 films include Blue Collar (1978), Hardcore (1979), American Gigolo (1980), Mishima: A Life in Four Chapters (1985), Light Sleeper (1992), Affliction (1997), and First Reformed (2017), with the last of these earning him his first Academy Award nomination. Schrader's work frequently depicts "man in a room" stories which feature isolated, troubled men confronting an existential crisis.

Raised in a strict Calvinist family, Schrader attended Calvin College before pursuing film studies at UCLA on the encouragement of film critic Pauline Kael. He then worked as a film scholar and critic, publishing the book Transcendental Style in Film: Ozu, Bresson, Dreyer (1972) before transitioning to screenwriting in 1974. The success of Taxi Driver in 1976 brought greater attention to his work, and Schrader began directing his own films, beginning with Blue Collar (co-written with his brother, Leonard Schrader). Schrader has described three of his recent films as a loose trilogy: First Reformed (2017), The Card Counter (2021), and Master Gardener (2022).

Schrader was born in Grand Rapids, Michigan, the son of Joan (née Fisher) and Charles A. Schrader, an executive.^{[citation needed]} Schrader's family attended the Calvinist Christian Reformed Church. Schrader's mother was of Dutch descent, the daughter of emigrants from Friesland, while Schrader's paternal grandfather was from a German family that had come to the U.S. through Canada.

His early life was based upon the religion's strict principles and parental education. He did not see a film until he was seventeen years old when he was able to sneak away from home. In an interview, he stated that The Absent-Minded Professor was the first film he saw. In his own words, he was "very unimpressed" by it, while Wild in the Country, which he saw sometime later, had quite some effect on him. Schrader attributes his intellectual rather than emotional approach towards movies and movie-making to his having no adolescent movie memories.

Schrader earned his B.A. in philosophy with a minor in theology from Calvin College but decided against becoming a minister. He then earned an M.A. in film studies at the UCLA Film School upon the recommendation of Pauline Kael, who encouraged him to be a film critic.

Schrader first became a film critic, writing for the Los Angeles Free Press and later for Cinema magazine. His book Transcendental Style in Film: Ozu, Bresson, Dreyer, which examines the similarities between Robert Bresson, Yasujirō Ozu, and Carl Theodor Dreyer, was published in 1972. Other film-makers who made a lasting impression on Schrader are John Ford, Jean Renoir, Roberto Rossellini, Alfred Hitchcock, and Sam Peckinpah. Renoir's The Rules of the Game he called the "quintessential movie" which represents "all of the cinema".

In 1974, Schrader and his brother Leonard co-wrote The Yakuza, a film set in the Japanese crime world. The script became the subject of a bidding war, eventually selling for $325,000. The film was directed by Sydney Pollack and starred Robert Mitchum. Robert Towne, best known for Chinatown, also received a credit for his rewrite. Although The Yakuza failed commercially, it brought Schrader to the attention of the new generation of Hollywood directors. In 1975, he wrote the script for Obsession for Brian De Palma. Schrader wrote an early draft of Steven Spielberg's Close Encounters of the Third Kind (1977), but Spielberg disliked the script, calling it "terribly guilt-ridden", and opted for something lighter. He also wrote an early draft of Rolling Thunder (1977), which the film's producers reworked without his participation. He disapproved of the final film. Schrader's script about an obsessed New York City taxi driver became Martin Scorsese's film Taxi Driver, which was nominated for the Oscar for Best Picture and won the Palme d'Or at the Cannes Film Festival. Besides Taxi Driver (1976), Scorsese also drew on scripts by Schrader for Raging Bull (1980), co-credited to Mardik Martin; The Last Temptation of Christ (1988); and Bringing Out the Dead (1999).

Thanks partly to critical acclaim for Taxi Driver, Schrader was able to direct his first feature, Blue Collar (1978), co-written with his brother Leonard. Blue Collar features Richard Pryor, Harvey Keitel, and Yaphet Kotto as car factory workers attempting to escape their socio-economic rut through theft and blackmail. He has described the film as challenging to make, because of the artistic and personal tensions between him and the cast. During principal photography, he suffered an on-set mental collapse, which led him to reconsider his career seriously. John Milius acted as executive producer on the following year's Hardcore, again written by Schrader, a film with many autobiographical parallels in his depiction of the Calvinist milieu of Grand Rapids, and in the character of George C. Scott, which was based on Schrader's father. Among Paul Schrader's films in the 1980s were American Gigolo starring Richard Gere (1980), his Cat People (1982) a remake of the 1942 film Cat People, and Mishima: A Life in Four Chapters (1985). Inspired by Japanese writer Yukio Mishima, the film interweaves episodes from Mishima's life with dramatizations of segments from his books. Mishima was nominated for the top prize (the Palme d'Or) at the Cannes Film Festival. Francis Ford Coppola and George Lucas served as executive producers. Schrader also directed Patty Hearst (1988), about the kidnapping and transformation of the Hearst Corporation heiress. In 1987, he was a member of the jury at the 37th Berlin International Film Festival.