In demonology Sitri is a Great Prince of Hell, and reigns over sixty legions of demons. He causes men to love women and vice versa, and makes them to show themselves naked if it is desired. He also reveals secrets of women, mocking them.

He is depicted with the face of a leopard and the wings of a griffin, but under the conjurer's request he changes into a very beautiful man.

Other spellings: Bitru, Sytry.

See also The Lesser Key of Solomon, Ars Goetia.