A non-contact communication method determination circuit includes a determiner which determines whether or not a binary signal of a received radio signal is a binary signal of a radio signal with any of a plurality of first non-contact communication methods, wherein the determiner is configured to detect a time interval between edges of the binary signal, and compares the detected time interval with a predetermined time interval between edges of a binary signal in the plurality of first non-contact communication methods, so as to determine whether or not the binary signal of the received radio signal is the binary signal of the radio signal with any of the plurality of first non-contact communication methods, and the time interval between the edges of the binary signal is a time interval between falling edges of the binary signal.
