A driving support system mountable to an own vehicle includes an object detection sensor detecting a first object, a communication unit performing communication with a second object around the own vehicle, a direction determining unit determining whether a first direction from the own vehicle to the first object is the same as a second direction from the own vehicle to the second object with which the communication unit performs communication, an identity determining unit determining whether the first object is identical with the second object based on information acquired by the object detection sensor and the communication unit when the first direction is the same as the second direction, and a driving supporting unit performing driving support based on information acquired from an object determined in advance between the first object and the second object when it is determined that the first object is identical with the second object.