To improve the practical effect of the route guidance by permitting a forced guidance in the case where no guidance is made at a spontaneous guide timing because of a short distance between intersections under guidance.

A specified guidance is made at a spontaneous guide timing when the distance from an intersection under guidance is a specified value a0. When no spontaneous guide timing is generated because of a short distance between own vehicle position and an expected intersection B under guidance next to a first passed intersection A under guidance, a guide timing is forcibly generated to guide. Concretely, just after passing the first intersection A, the vehicle is guided to at least the second intersection B under guidance and also, in this case, to a third intersection C under guidance. Because of also a short distance between the second and third intersections B, C under guidance, the vehicle is guided to the third intersection C just after passing the second intersection B.