According to the apparatus for parking an automobile into a garage disclosed in Patent Literature 3, an own vehicle, obstacles, and a parking space based on position data obtained through a GPS device, a variety of sensors, and the like, and a calculated candidate route for parking into a garage can be displayed as being superimposed to an actual image taken by a vehicle-mounted camera. Here, the obstacles and the parking space are displayed graphics each indicating an outline and area thereof. Further, the candidate route is displayed by a polygonal curve connecting a plurality of points. Accordingly, it is difficult for a driver to sufficiently recognize how the own vehicle moves to the parking space while avoiding the obstacles. Furthermore, in a case of parking at a first-time or unfamiliar parking space, it is extremely difficult to imagine whether the parking space is sufficiently large with respect to the own vehicle and how the own vehicle parks.