An IC card according to an embodiment includes a contact communication interface, a non-contact communication interface, and a processor. A contact communication means is configured to perform contact communication with a reader/writer. A non-contact communication means is configured to perform non-contact communication with the reader/writer. The processor is configured to set an Answer To Reset (ATR) in the contact communication and an Answer To Select (ATS) in the non-contact communication based on a predetermined command including historical bytes.