Keiji Terui (照井 啓司) is a Japanese screenwriter.
Terui worked on the anime series Dragon Ball, Dragon Ball Z, and Dragon Ball Kai. He also worked on the movies Dr. Slump and Arale-chan: Hoyoyo! Dream Capital Mecha Police, Dragon Ball: Sleeping Princess in Devil's Castle, Goku's Fire Brigade and Goku's Traffic Safety.
Outside of the anime adaptations of Akira Toriyama's manga series, Keiji Terui worked on Ashita Tenki ni Nare!, Doteraman, Kamen no Ninja Akakage, Okawari-Boy Starzan S, Osomatsu-kun, Sasuga no Sarutobi, and Yume no Hoshi no Button Nose. He was also a writer for various Famicom adventure games published by Nintendo, with his most notable work being the background story for the original Legend of Zelda.