A driving support system for a vehicle, which is provided with a communication apparatus capable of bi-directional communication between the vehicle and an unspecified number of moving objects, detects the presence of a communication impeding intersection at which there is a radio-wave blocking object using information obtained by communication with at least one of the moving objects that is traveling on an intersecting road which intersects the road on which the vehicle is traveling. The driving support system then transmits to at least one of the moving objects on the road on which the vehicle is traveling at least one of communication impeding intersection information relating to the communication impeding intersection and moving object information relating to at least one of the moving objects that is on the intersecting road only when the presence of the communication impeding intersection has been detected.