To provide a mobile terminal capable of controlling operations other than information transmission (e.g. transmission of image data) from the mobile terminal to an apparatus for the mobile terminal between the apparatus for the mobile terminal (digital camera or the like) for receiving or outputting information (image or the like) and the mobile terminal connected to the apparatus for the mobile terminal via a data request signal line and a data output signal line and transmitting/receiving information such as an image without the need for increasing the number of signal lines furthermore.

A mobile phone 30 (mobile terminal) connected to the digital camera 50 (apparatus for mobile terminal) via the data request signal line L1b and the data output signal line L1c to transmit/receive image information is provided with a command output means for transmitting a command signal to control the digital camera 50 via the data request signal line L1b, and the command output means is characterized in that the output means outputs a command signal in a form different from a signal form of image data to transmit the image information.