In Greek mythology, Teucer (/ˈtjuːsər/), also Teucrus, Teucros or Teucris (Greek: Τεῦκρος, Teukros), was the son of King Telamon of Salamis Island and Hesione, daughter of King Laomedon of Troy. He fought alongside his half-brother, Ajax, in the Trojan War and is the legendary founder of the city of Salamis on Cyprus. Through his mother, Teucer was the nephew of King Priam of Troy and the cousin of Hector and Paris - all of whom he fought against in the Trojan War.
During the Trojan War, Teucer was mainly a great archer, who loosed his shafts from behind the giant shield of his half-brother Ajax the Great. When Hector was driving the Achaeans back toward their ships, Teucer gave the Argives some success by killing many of the charging Trojans, including Hector's charioteer, Archeptolemus son of Iphitos. However, every time he shot an arrow at Hector, Apollo, the protector of the Trojans, would foil the shot. At one point in his rage at Teucer's success, Hector picked up a huge rock and flung it at him. The rock injured Teucer, so that he retired from the fighting for a certain period of time. He took up a spear to fight in the war after his bow was broken by Zeus. He once again challenged Hector, and narrowly avoided the path of Hector's flying javelin in the ensuing battle. He was also one of the Danaans to enter the Trojan Horse. In total, Teucer slew thirty Trojans during the war; of those Homer mentions Aretaon, Orsilochus, Ormenus, Ophelestes, Daetor, Chromius, Lycophontes, Amopaon, Melanippus, Prothoon and Periphetes, as well as the aforementioned Archeptolemus. He also wounded Glaucus, son of Hippolochus.