Conan the Barbarian is a 1982 American epic sword-and-sorcery film directed by John Milius and written by Milius and Oliver Stone. Based on Robert E. Howard's Conan, the film stars Arnold Schwarzenegger and James Earl Jones, and tells the story of a barbarian warrior named Conan (Schwarzenegger) who seeks vengeance for the death of his parents at the hands of Thulsa Doom (Jones), the leader of a snake cult.

Ideas for a Conan film were proposed as early as 1970; executive producer Edward R. Pressman and associate producer Edward Summer began a concerted effort to get the film made in 1975. It took them two years to obtain the film rights, after which they recruited Schwarzenegger for the lead role and Stone to draft a script. Pressman lacked capital for the endeavor. In 1979, after having his proposals for investments rejected by the major studios, he sold the project to Dino De Laurentiis; his daughter Raffaella produced the film. Milius was appointed as director and he rewrote Stone's script. The final screenplay integrated elements from various Howard stories, as well as the Japanese films Seven Samurai (1954) and Kwaidan (1965). Filming took place in Spain over five months in the regions around Madrid and the province of Almería. The sets, designed by Ron Cobb, were based on Dark Age cultures and Frank Frazetta's paintings of Conan. Milius eschewed optical effects, preferring to realize his ideas with mechanical constructs and optical illusions. Schwarzenegger performed most of his own stunts, and two types of sword, costing $10,000 each, were forged for his character. The editing process took over a year, and several violent scenes were cut out.

Conan the Barbarian was distributed by Universal Pictures in North America and 20th Century Fox in other territories. It premiered on March 16, 1982 in Spain and May 14, 1982 in North America. Upon release, the film received mixed reviews from critics and audiences alike, mainly positive for its action sequences, production design, directing, visual style, and effects, but negatively received for its violent content and screenwriting, as well as some substandard performances. Despite this, the film became a commercial success for its backers, grossing between $69 million and $79 million at box offices around the world against its budget of $20 million.

The film earned Schwarzenegger worldwide recognition. Conan the Barbarian has been frequently released on home video, the sales of which had increased the film's gross to more than $300 million by 2007. In the years following its release, it became a cult film, and its success spawned a sequel, titled Conan the Destroyer (1984). It ultimately led to the production of a 2011 reboot of the same name.