To provide a touch panel type input device capable of preventing input information from being memorized by a nearby suspicious person by the movement of a user's hand in the input device for inputting information such as a personal identification number from a touch panel.

An operator confirmation camera 14 photographs the background of the user 21. A suspicious person detecting camera 10-2 photographs the background of the user 21. An image analyzing part 130 inputs the photographed images of the operator confirmation camera 14 and suspicious person detecting camera 10-2 and determines whether a suspicious person 22 is photographed. If the image analyzing part 130 determines that the suspicious person 22 is recorded, a display area change signal generating part 140 generates a display area change signal and outputs it to a display area changing part 120. The display area changing part 120, upon the input of the display area change signal, displays a warning such as "there is a person in the surroundings" on a liquid crystal display 111 and changes the arrangement(a display area) of ten keys.