The control unit generates a 3D view in which the vehicle and its surroundings are viewed from the set viewpoint from the captured images acquired from the imaging unit that captures an image of the surroundings of the vehicle and the polygon model indicating the vehicle, and displays the generated 3D view on the display. Here, when the obstacle detecting unit detects the obstacle 52 existing in the traveling direction of the vehicle, the viewpoint of 3D view displayed on the display can be switched to the viewpoint where the traveling direction of the vehicle 50 can be confirmed and the obstacle 52 is displayed on the display.