The present invention relates to a copper alloy for electric and electronic device, a copper alloy sheet for electric and electronic device, a conductive component for electric and electronic device, and a terminal. The copper alloy for electric and electronic device includes more than 2.0 mass % to 15.0 mass % of Zn; 0.10 mass % to 0.90 mass % of Sn; 0.05 mass % to less than 1.00 mass % of Ni; 0.001 mass % to less than 0.100 mass % of Fe; 0.005 mass % to 0.100 mass % of P; and a remainder comprising Cu and unavoidable impurities, in which 0.002≦Fe/Ni