When a vehicle speed is equal to or lower than a vehicle speed threshold value, a display displays an imaged image in which an icon is displayed at the position corresponding to the object as an overhead view display image. When the vehicle speed exceeds the vehicle speed threshold value, the display displays an icon display image in which the icon is displayed at the position corresponding to the object as the overhead view display image. Though the overhead view display image displayed on the display is switched between the imaged image and the icon display image according to the change of the vehicle speed, the icon representing the object can continuously be displayed.