An IC card of an embodiment is provided with a receiver to receive a first command transmitted from an external device, a determining processor to determine whether or not the first command is a switching request command to request switching the IC card from a passive mode to an active mode, a switching processor to switch oneself from the passive mode to the active mode, when the first command is the switching request command, an identification information acquiring processor to acquire identification information of other IC card existing in a communicable range of the external device from the switching request command, a command generating processor to generate a second command which includes the identification information acquired by the identification information acquiring processor so as to make the other IC card execute processing, and a command transmitter to transmit the second command to the other IC card.