The Fourth Man (Dutch: De vierde man) is a 1983 Dutch psychological-erotic thriller film directed by Paul Verhoeven and starring Jeroen Krabbé, Renée Soutendijk and Thom Hoffman. Based on the 1981 novel of the same name by Gerard Reve, it follows Gerard, a bisexual writer who has a romantic encounter with a mysterious woman, Christine, and subsequently becomes enamored of Herman, another of her male lovers; while attempting to pursue Herman, Gerard is plagued by a series of disturbing visions suggesting Christine may be a murderess who has chosen him as her fourth victim.

Released in 1983, the film was a box-office success in the Netherlands, and in the United States, where it became the highest-grossing Dutch film of all time. It was the Dutch entry for the Best Foreign Language Film at the 56th Academy Awards, but was not accepted as a nominee. The film is sexually explicit and, like many of Verhoeven's other films, shows graphic violence and gore.