Abstract: A non-contact IC card comprising a one turn. loop antenna pattern provided on a substrate is provided which, in a non-contact manner, transmits information to exterior and receives information therefrom, and in addition can obtain an electric powder from an electric wave transmitted from exterior. By virtue of this constitution, the non-contact IC card, in a for in accordance with ISO, can transmit and receive signals while supplying an electric power for use in the non-contact IC card, even in the case of a frequency of a carrier of ten-odd MHz.