A course guidance system comprising: a vehicle location information acquisition unit that is adapted to acquire vehicle location information indicating a current location of a vehicle; a road information acquisition unit that is adapted to acquire road information including information on at least one road link and information on an exit/entrance node, the at least one road link indicating at least one out-of-facility road, the exit/entrance node indicating a location of an exit/entrance of a facility that has the exit/entrance connected to the at least one out-of-facility road via an exit lane; a facility exit determination unit that is adapted to determine that the vehicle is exiting from the facility to the at least one out-of-facility road; an estimated connection angle determination unit that is adapted to determine an estimated connection angle (α), the estimated connection angle (α) being an estimated connection angle of the exit lane of the facility at the exit/entrance node, the exit lane being connected to the exit/entrance node; an after-exit guidance information generation unit that is adapted to generate course guidance information based on the determined estimated connection angle (α) when the vehicle is determined to be exiting, the course guidance information being guidance on a traveling direction to a guidance road, the guidance road being one of the at least one out-of-facility road forming a guidance route on which the vehicle is intended to travel after exiting from the exit lane; and characterized by a connection angle evaluation unit that is adapted to correct the estimated connection angle (α) at the exit/entrance node based on a relative angle (θ) between an actual traveling road and the guidance road if it is detected that, based on the vehicle location information and the road information, the actual traveling road and the guidance road differ and is adapted to record the estimated connection angle that has been corrected as a corrected estimated connection angle, the actual traveling road being a road on which the vehicle is traveling after exiting from the exit lane. a vehicle location information acquisition unit that is adapted to acquire vehicle location information indicating a current location of a vehicle; a road information acquisition unit that is adapted to acquire road information including information on at least one road link and information on an exit/entrance node, the at least one road link indicating at least one out-of-facility road, the exit/entrance node indicating a location of an exit/entrance of a facility that has the exit/entrance connected to the at least one out-of-facility road via an exit lane; a facility exit determination unit that is adapted to determine that the vehicle is exiting from the facility to the at least one out-of-facility road; an estimated connection angle determination unit that is adapted to determine an estimated connection angle (α), the estimated connection angle (α) being an estimated connection angle of the exit lane of the facility at the exit/entrance node, the exit lane being connected to the exit/entrance node; an after-exit guidance information generation unit that is adapted to generate course guidance information based on the determined estimated connection angle (α) when the vehicle is determined to be exiting, the course guidance information being guidance on a traveling direction to a guidance road, the guidance road being one of the at least one out-of-facility road forming a guidance route on which the vehicle is intended to travel after exiting from the exit lane; and characterized by a connection angle evaluation unit that is adapted to correct the estimated connection angle (α) at the exit/entrance node based on a relative angle (θ) between an actual traveling road and the guidance road if it is detected that, based on the vehicle location information and the road information, the actual traveling road and the guidance road differ and is adapted to record the estimated connection angle that has been corrected as a corrected estimated connection angle, the actual traveling road being a road on which the vehicle is traveling after exiting from the exit lane.