Tsukihime (Japanese: ??, lit. "Lunar Princess") is a Japanese adult d?jin visual novel created by Type-Moon, who first released it at the Winter Comiket in December 2000. It was adapted in 2003 into an anime series, Shingetsutan Tsukihime, produced by J.C.Staff and Geneon, and a manga series, which was serialized between October 2003 and September 2010 in MediaWorks' seinen magazine Dengeki Daioh, with 10 volumes released.

Its fame and renown is often attributed to its comprehensive and expansive storyline and its writer Kinoko Nasu's unique style of storytelling. As well as its anime and manga adaptations, it has also spawned numerous merchandising and memorabilia franchises. A remake to the visual novel is also currently being planned.