A current location detection unit for detecting a current position of an own vehicle as a location of the vehicle, a route search processing unit for searching for a route to a destination based on the location of the vehicle, a route guide point setting processing unit for setting a route guide point at a predetermined point on the searched route before a guide intersection, an intersection counting processing unit for calculating the number of intersections based on a traffic signal and a feature on the searched route from the route guide point to the guide intersection, and a voice output processing unit for performing a voice output based on the number of the intersections when the vehicle arrives at the route guide point.