In demonology, Furfur (other spelling: Furtur) is a powerful Great Earl of Hell, being the ruler of twenty-six legions of demons. He is a liar unless compelled to enter a magic triangle; then he gives true answers to every questions speaking with a rough voice. Furfur causes love between a man and a woman, creates storms and tempests, thunders, lightning and blasts, and teaches on secret and divine things.

He is depicted as a hart or winged hart, and also as an angel. To some authors he changes from hart into angel when compelled to enter the magic triangle.

'Furfur' or 'furfures' in Latin means "bran".

See also: The Lesser Key of Solomon, Ars Goetia.