To provide a mobile terminal capable of detecting a USB client cable, a USB host cable and a conversion cable for AUDIO connected to the mobile terminal, and an earphone connected to an end of the conversion cable when the connection is done, and automatically detecting the kind.

A control unit 20 performs interruption processing to the displacement of respective detection ports connected to a connector 41 or the like and detects that one of the cables is connected. The interruption program of a cable detecting function 10 activated by the interruption of the control unit 20 confirms the level of the respective detection ports, determines from which detection port the interruption is, and detects which cable is inserted.