To improve an operational feeling in touch operation to a touch panel and reduce wrong operation.

Each time a display screen is switched to a display screen of each screen application unit 3 corresponding to a display screen, the screen application unit 3 notifies a touch panel control unit 2 of area information on each operator disposed on the display screen on the basis of screen information stored in a screen information storage unit 31. In the touch panel control unit 2, an area information acquisition unit 21 acquires the area information notified by the screen application unit 3 corresponding to the display screen after the switching and stores the area information in an area information storage unit 22. Then, a touch information acquisition unit 23 detects coordinates of a touch position on a touch panel 1, a comparison determination unit 24 determines whether or not the duration of a touch state in a detection area including the coordinates of the touch position exceeds a reference duration, and when the duration exceeds the reference duration, a detection area notification unit 25 notifies the touch panel control unit 2 of touch detection information.