VEHICLE DRIVING ASSISTANCE DEVICE

An object of the present invention is to provide a technology that enables avoidance of situations in which the driver's own vehicle enters the course of a vehicle behind with a change in the course of the driver's own vehicle without relying upon a device for detecting the vehicle running diagonally behind the driver's own vehicle in a driving assistance apparatus that causes the driver's own vehicle to change its course to avoid a collision with a solid object existing in the course of the vehicle. To achieve the object, according to the present invention, a change of the course of the driver's own vehicle is forbidden when a dividing line indicating a lane boundary is not detected on the road between the driver's own vehicle and a solid object.