<p>A radiator for an antenna is provided with a loop-like first skeleton slot antenna, and a loop-like second skeleton slot antenna and a third skeleton slot antenna which are provided inside the loop of the first skeleton slot antenna. The skeleton slot antennas are on the same flat surface and share a pair of feeding points and have substantially rectangular shapes, respectively. The both ends of the both short sides of the second skeleton slot antenna are connected perpendicularly to the long sides of the first skeleton slot antenna by using connecting bodies which are arranged to extend from the both ends in the direction same as that of the short sides. The third skeleton slot antenna has short sides thereof composed of the connecting bodies arranged on the short sides of the second skeleton slot antenna and on the both ends of such short sides, and the long sides thereof are composed of parts of the long sides of the first skeleton slot antenna.</p>
