Owing to that the picture image 40 of the own vehicle is superimposed to the scenery 39 taken by the front cameras 16, 16 as described above, it is possible for the occupant to recognize, visually and more easily, situations (e.g., positional relation, orientation, and the like) of the own vehicle travelling on the road along the scheduled travel course on the relatively small display screen 34. Accordingly, in the case of FIG. 8, it is also possible to eliminate the symbol image 37′ that indicates the travel course of the own vehicle.