Sultan Alauddin Riayat Shah ibni Almarhum Sultan Mansur Shah (died 1488) was a sultan of the Malacca Sultanate from 1477 to 1488. He was famous for going undercover at night to personally check on the well-being of his people, as well as on the condition of his sultanate itself. On one of these nights he was even reported to have run after a thief himself. However, his position is envied by his brother, Raja Ahmad (the ruler of Pahang, a region under Malaccan rule), because Raja Ahmad believed that the rulership of Malacca was his right.