A display device comprising: a display unit adapted to display an image on an image display surface; a touch panel adapted to repeatedly detect a touched position of a touching object, the touch panel being installed on the image display surface of the display unit a dead zone setting unit adapted to set, when the touching object has touched the touch panel, as a current dead zone an area including an initial touched position of the touching object on the touch panel as a center position of the set area and to set as a current scroll target position, serving as a target position of scroll of the displayed image, the initial touched position; a scroll target position setting unit adapted to, while the touch panel is being touched, either hold the current scroll target position when the currently detected touched position of the touching object is not outside the set current dead zone, or update the current scroll target position with the currently detected touched position of the touching object on the touch panel when the currently detected touched position of the touching object is outside the set current dead zone; and a scroll controlling unit adapted to control the display unit such that the displayed image is scrolled according to each updated scroll target position, wherein the dead zone setting unit is further adapted to, for each updated scroll target position, update the current dead zone such that an intermediate position becomes the center position of the updated dead zone, said intermediate position being a position between the currently detected touched position of the touching object on the touch panel outside the current dead zone and the center position of the current dead zone. a display unit adapted to display an image on an image display surface; a touch panel adapted to repeatedly detect a touched position of a touching object, the touch panel being installed on the image display surface of the display unit a dead zone setting unit adapted to set, when the touching object has touched the touch panel, as a current dead zone an area including an initial touched position of the touching object on the touch panel as a center position of the set area and to set as a current scroll target position, serving as a target position of scroll of the displayed image, the initial touched position; a scroll target position setting unit adapted to, while the touch panel is being touched, either hold the current scroll target position when the currently detected touched position of the touching object is not outside the set current dead zone, or update the current scroll target position with the currently detected touched position of the touching object on the touch panel when the currently detected touched position of the touching object is outside the set current dead zone; and a scroll controlling unit adapted to control the display unit such that the displayed image is scrolled according to each updated scroll target position, wherein the dead zone setting unit is further adapted to, for each updated scroll target position, update the current dead zone such that an intermediate position becomes the center position of the updated dead zone, said intermediate position being a position between the currently detected touched position of the touching object on the touch panel outside the current dead zone and the center position of the current dead zone.