The travel information obtained from the automated driving control unit 7 may include, for example, route information such as maps of a current position of the own vehicle and the vicinity thereof, road information, and traffic lanes, a travel speed of the own vehicle, a steering angle, and the like. According to the above, the symbol image 37 can be projected as being appropriately positioned with respect to an overtaking lane 38 in the actual scenery 36. In particular, it is preferable that an eye position of an occupant at the driver's seat is previously confirmed by the automated driving control unit 7 or the HUD device 22, so that the symbol image 37 can be displayed more accurately with respect to the actual scenery 36.