A communication device for managing a key necessary for secure near field communication includes an IC card function executing unit, a reader/writer function executing unit, a receiving unit, a determining unit, and a function execution controlling unit. The IC card function executing unit executes a function of an IC card. The reader/writer function executing unit executes a function of a reader/writer. The receiving unit receives a command. The determining unit determines whether the receiving command is intended for the IC card function or the reader/writer function. The function execution controlling unit controls the IC card function executing unit to execute the IC card function or the reader/writer function executing unit to execute the reader/writer function according to a result determined by the determining unit.