This copper alloy wire is a copper alloy wire which is made of a precipitation hardening-type copper alloy containing Co, P, and Sn and is manufactured using a continuous cast-rolling method or cold working of a continuous cast wire rod manufactured using a continuous casting method, in which the copper alloy wire has a composition including Co: more than or equal to 0.20 mass % and less than or equal to 0.35 mass %, P: more than 0.095 mass % and less than or equal to 0.15 mass %, and Sn: more than or equal to 0.01 mass % and less than or equal to 0.5 mass % with a balance being Cu and inevitable impurities.