Abstract: Provided is a touch-panel-equipped display device that is capable of detecting a touch on a side surface of a case (1) at a high accuracy by a simple controlling operation, without any hardware such as expensive sensors being provided additionally. In the touch-panel-equipped display device, a side surface electrode part can be electrically connected by capacitive coupling with a Y-direction electrode part. A change in capacitive coupling when the side surface electrode part is touched by a finger or the like, therefore, is reflected in a sense signal acquired by the Y-direction electrode part. In other words, in the touch-panel-equipped display device, a touch on the side surface electrode part can be detected using the sense signal. The touch-panel-equipped display device, therefore, is capable of detecting a touch on the side surface electrode part by using hardware and signal processing for touch detection in a conventional touch panel.