1. A cover for a portable terminal comprising: a first metallic layer formed of a metallic material, the first metallic layer having a through hole; a second metallic layer provided on a surface of the first metallic layer, the second metallic layer formed of a different material from that of the first metallic layer; and an exposed portion protruding from a surface of the second metallic layer and extending through the through hole so as to be exposed to an outside of the first metallic layer.