Lupin III: The Fuma Conspiracy (Japanese: ルパン三世 風魔一族の陰謀, Hepburn: Rupan Sansei Fūma Ichizoku no Inbō, lit. "Lupin III: The Plot of the Fuma Clan") is a 1987 Japanese animated action adventure comedy film. It is the fourth animated feature film based on the 1967–69 manga series Lupin III by Monkey Punch. Although classified as an original video animation by Tokyo Movie Shinsha, it was first given a theatrical release on December 26, 1987, by Toho. Due to budgetary reasons, it utilized a different voice cast from previous animated entries, with Toshio Furukawa as Lupin III, Banjō Ginga as Daisuke Jigen, Mami Koyama as Fujiko Mine, Kaneto Shiozawa as Goemon Ishikawa XIII, and Seizō Katō as Inspector Koichi Zenigata. It was the first Lupin III animation since 1969's Pilot Film to not feature Yasuo Yamada as Lupin and the only one not to feature Kiyoshi Kobayashi as Jigen until 2021's animated television series Lupin III Part 6.

In the film, Lupin and his allies attempt to assist Goemon in rescuing his fiancée Murasaki from a clan of ninjas called the Fuma Clan, all while being chased by a formerly retired Zenigata.

It was released on subtitled VHS and LaserDisc in North America by AnimEigo in 1994 under the "Rupan III" name, due to copyright concerns with Maurice Leblanc's Arsène Lupin. In 2007, Discotek Media released it on DVD under its original name with an English dub.