A mobile terminal comprising: a circuit board; an antenna for transmitting and receiving radio signals; a case having two long lateral surfaces and two short lateral surfaces which are comprising a metal material; wherein the case comprises: a first member, a second member; wherein the first member and the second member are disposed to cover lateral surfaces of the circuit board and define external surfaces of the mobile terminal; a first slit portion located at a first end of the first member; a second slit portion located at a second end of the first member, the second end of the first member being opposite to the first end of the first member, wherein the first slit portion and the second slit portion are located at one of the two short lateral surfaces of the case; wherein the antenna comprises: the first member, wherein the first member forms a radiator of the antenna; a power feed connector for electrically connecting the first member with the circuit board; and a ground connector for electrically ground-connecting the first member with the circuit board, such that the power feed connector, the first member, and the ground connector form a conductive loop for radiating the radio signals, and wherein the one of the two short lateral surfaces of the case corresponds to a bottom lateral surface of the mobile terminal or to a top lateral surface of the mobile terminal. a circuit board; an antenna for transmitting and receiving radio signals; a case having two long lateral surfaces and two short lateral surfaces which are comprising a metal material; wherein the case comprises: a first member, a second member; wherein the first member and the second member are disposed to cover lateral surfaces of the circuit board and define external surfaces of the mobile terminal; a first slit portion located at a first end of the first member; a second slit portion located at a second end of the first member, the second end of the first member being opposite to the first end of the first member, wherein the first slit portion and the second slit portion are located at one of the two short lateral surfaces of the case; a first member, a second member; wherein the first member and the second member are disposed to cover lateral surfaces of the circuit board and define external surfaces of the mobile terminal; a first slit portion located at a first end of the first member; a second slit portion located at a second end of the first member, the second end of the first member being opposite to the first end of the first member, wherein the first slit portion and the second slit portion are located at one of the two short lateral surfaces of the case; wherein the antenna comprises: the first member, wherein the first member forms a radiator of the antenna; a power feed connector for electrically connecting the first member with the circuit board; and a ground connector for electrically ground-connecting the first member with the circuit board, such that the power feed connector, the first member, and the ground connector form a conductive loop for radiating the radio signals, and wherein the one of the two short lateral surfaces of the case corresponds to a bottom lateral surface of the mobile terminal or to a top lateral surface of the mobile terminal. the first member, wherein the first member forms a radiator of the antenna; a power feed connector for electrically connecting the first member with the circuit board; and a ground connector for electrically ground-connecting the first member with the circuit board, such that the power feed connector, the first member, and the ground connector form a conductive loop for radiating the radio signals, and wherein the one of the two short lateral surfaces of the case corresponds to a bottom lateral surface of the mobile terminal or to a top lateral surface of the mobile terminal.