Ascalaphus was a demigod and a son of Ares.
Ascalaphus was the son of Ares and Astyoche, the daughter of Actor, son of Azeus, son of Erginus. He was King of Orchomenus, and twin brother of Ialmenus. The brothers were counted among the Argonauts and the suitors of Helen, and led the Orchomenian contingent in the Trojan War. Ascalaphus died in the Trojan War as a result of a spear thrown by Deiphobus.