Muhammed VIII (1411–1431), common alternative spelling Muhammad, known as "the left handed", was the fourteenth Nasrid ruler of the Moorish Emirate of Granada in Al-Andalus on the Iberian Peninsula.
He, as eldest son, became Sultan after the death of his father Yusuf III. His first reign lasted from 1417 to 1419, and his second from 1427 to 1429. Immediately after coming to the throne, Muhammed renewed the treaties between Granada, Castile and Morocco, and sent troops to help the Moroccans in the Siege of Ceuta in 1418.