An information exchange device includes a human body communication unit which applies information flowing via a human body to a human body and detects information flowing via the human body, an information transmission unit which transmits information via the human body communication unit, an identification unit which identifies other device which can transmit information from the information transmission unit, a detection unit which detects a contact state with other human body, and a transmission control unit which starts transmission of information according to identification by the identification unit and a detection by the detection unit.