A portable terminal having a tuner for changing an antenna radiation pattern is disclosed. In the portable terminal, a main body has a main body PCB and a main body ground defined in the main body PCB. A folder is rotatably connected to the main body by a hinge device. An antenna device is provided at an upper end of the main body. The tuner is formed at a predetermined position of the main body in the vicinity of the antenna device, for changing a current distribution of the main body and thus changing an antenna radiation pattern of the portable terminal.