A portable apparatus includes an apparatus body including a first main body having therein a plurality of electric parts, and a second main body connected to the first main body to open and close a part of a surface of the first main body; a radiation member mounted in the second main body; and a heat transmitter mounted in the first main body to be connected with the electric parts at one side and contacted with the radiation member when the first main body is opened by operating the second main body. Since the radiation member is mounted to the second main body that does not frequently contact with a user during use of the portable apparatus, cooling of the portable apparatus can be efficiently performed.