In Greek mythology, Deiphobus was a son of Priam and Hecuba. Thus, he was a prince of Troy. During the Trojan War, Deiphobus married Helen after Paris died. Deiphobus was killed by Menelaus, who took Helen with him back to Sparta.

In the Virgil's Aeneid, Deiphobus appears in the Underworld to Aeneas. He tells Aeneas the story of his death, which entails Helen's betrayal in signaling Menelaus to Deiphobus' bedchamber. He was mutilated in the sack of Troy. While with Aeneas, he begs the gods for revenge against the Greeks.