The arrow mark being the symbol image 83 indicating the travel course includes a first portion extending approximately straightly from a position just in front of the front windshield 15 to the symbol image 84 and a second portion extending therefrom in an opposite direction to a position where a leading end thereof reaches the parking space 82 while changing orientation thereof toward a road side of the road 70 by 90 degrees. To make the position of the parking space 82 be easily recognizable for the occupant, for example, an outline box shape may be superimposed to the actual scenery 36.