A portable terminal comprising: an antenna (121, 122) mounted to an inner side surface of a body of the portable terminal, wherein the antenna (121, 122) includes a first surface and a second surface where the second surface is adjacent to the inner side surface of the body; a rear case covering at least a portion of the inner side surface of the body and wherein the rear case includes a first surface, a second surface adjacent to the inner side of the body, and a battery mounting space, and a cover provided on the inner side surface of the body, the cover covering the antenna (121, 122) and the rear case, wherein the antenna (121, 122) and the rear case are separably coupled to the inner side surface of the body, and when the cover is separated from the inner side surface of the body the first surface of the antenna (121, 122) and the first surface of the rear case are exposed to outside the portable terminal; wherein the antenna (121, 122) comprises: an upper antenna disposed at an upper end of the body, and a lower antenna disposed at a lower end of the body; and wherein the rear case is disposed between the upper antenna and the lower antenna, and an upper end of the rear case is coupled to the upper antenna along a circumference of a lower end of the upper antenna and a lower end of the rear case is coupled to the lower antenna along a circumference of an upper end of the lower antenna. an antenna (121, 122) mounted to an inner side surface of a body of the portable terminal, wherein the antenna (121, 122) includes a first surface and a second surface where the second surface is adjacent to the inner side surface of the body; a rear case covering at least a portion of the inner side surface of the body and wherein the rear case includes a first surface, a second surface adjacent to the inner side of the body, and a battery mounting space, and a cover provided on the inner side surface of the body, the cover covering the antenna (121, 122) and the rear case, wherein the antenna (121, 122) and the rear case are separably coupled to the inner side surface of the body, and when the cover is separated from the inner side surface of the body the first surface of the antenna (121, 122) and the first surface of the rear case are exposed to outside the portable terminal; wherein the antenna (121, 122) comprises: an upper antenna disposed at an upper end of the body, and a lower antenna disposed at a lower end of the body; and wherein the rear case is disposed between the upper antenna and the lower antenna, and an upper end of the rear case is coupled to the upper antenna along a circumference of a lower end of the upper antenna and a lower end of the rear case is coupled to the lower antenna along a circumference of an upper end of the lower antenna. an upper antenna disposed at an upper end of the body, and a lower antenna disposed at a lower end of the body; and wherein the rear case is disposed between the upper antenna and the lower antenna, and an upper end of the rear case is coupled to the upper antenna along a circumference of a lower end of the upper antenna and a lower end of the rear case is coupled to the lower antenna along a circumference of an upper end of the lower antenna.