An input device includes a display unit and a touch panel provided to the display unit. In at least one embodiment, the input device further includes: a finger image generation section which generates respective images of, among a plurality of fingers pressing on the touch panel, a first finger and a second finger adjacent to the first finger; and a display process section which displays on the display unit a plurality of input images corresponding to a distance between two images generated by the finger image generation section and respective sizes of the two images. This allows the input device including the touch panel to adjust, as a result of a single setting, the input images to be appropriate for sizes of fingers and a size of a hand of the user.