To allow combining devices having different functions according to an application, and improve convenience for a user. There are provided a wearing type terminal 1 provided with an external case 10 having a display unit 131 on the upper surface side and belt members 4a and 4b which can be connected to the both sides of the external case 10 respectively; and a docking type device 2 which is detachably engaged with the bottom portion of the external case 10 of the wearing type terminal 1, and is electrically connected to the wearing type terminal 1 via a dock side connection terminal 21. The wearing type terminal 1 and the docking type device 2 are provided with a function which carries out transmission and receiving of data to be displayed on the display unit 131 via the dock side connection terminal 21.