When it is necessary to wait passing of an oncoming vehicle 57′ getting closer on an opposing lane 52′, a stop line mark 58′ as illustrated in FIG. 17B is displayed on the taken scenery 39 at the monitor device 24 to be matched with a position where the own vehicle is to stop. An arrow of the symbol 53′ is corrected so that the leading end thereof is matched with the stop line mark 58′. Any of a variety of shapes other than the shape in FIG. 17B may be adopted for the stop line mark 58.