Specifically, the virtual image 85 appears to move out frontward from a position just in front of the front windshield 15 and moves straightly to the position of the symbol image 84 indicating the stop line mark along the first portion of the symbol image 83 as illustrated in FIG. 25A, and then, stops once at the position of the symbol image 84 as illustrated in FIG. 25B. Subsequently, as illustrated in FIG. 25C, the virtual image 851 moves backward along the second portion of the symbol image 83, changes orientation thereof toward a road side of the road 70 by 90 degrees, and moves to and stops at the parking space 82.