Archias (Ancient Greek: Ἀρχίας) of Thurii was an actor turned military agent of the Macedonian general Antipater in the 4th century BCE in ancient Greece. He was nicknamed "the hunter of the exiles" (φυγαδοθήρας). Archias also apprehended the renowned Greek statesman and orator Demosthenes in the temple of Poseidon in Calaureia, leading to Demosthenes's suicide after a memorable exchange recorded by Plutarch. Archias's fortunes at some point afterward took a downward turn. He eventually died of hunger, ending his life in great poverty and disgrace.