In Greek mythology, Phineus (, ) was a son of Belus by Anchinoe and thus brother to Aegyptus, Danaus and Cepheus. He had been engaged to Cepheus' daughter Andromeda before she wed Perseus, and Phineus plotted against him, leading Perseus to turn him and his co-conspirators into stone by showing them the head of Medusa. The affair appears to have formed part of Euripides' lost Andromeda, but the sole extensive ancient treatment is found Ovid's Metamorphoses.