1. A portable terminal comprising: a terminal body, the terminal body having an insertion hole formed therein; a cover attached to the terminal body, the cover defining an exterior of the portable terminal, the cover being located in the insertion hole, the cover including: 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, the exposed portion including at least one of a pattern of characters, numbers, symbols, and logos; and a key body arranged in the insertion hole formed in the terminal body, wherein another surface of the second metallic layer is coupled to the key body to define an input key.