The Thin Man (1934) is a detective novel by Dashiell Hammett, originally published in Redbook. Although he never wrote a sequel, the book became the basis for a successful six-part film series which also began in 1934 with The Thin Man and starred William Powell and Myrna Loy. A Thin Man television series followed in the 1950s.

An early draft of the story, written several years before the published version, and now in print in several collections of Hammett's work, does not mention the main characters of the novel, Nick and Nora Charles, and ends after ten chapters. It is about a quarter of the length of the finished book.

The Thin Man was Hammett's last novel.