Driving support apparatus

In a driving support apparatus mounted in an own vehicle, an obstacle detector detects an obstacle present on a front side in a traveling lane. A rear vehicle detector detects a rear vehicle. An operation controller determines an avoiding operation by one of a lane change operation for changing to a lane adjacent to the traveling lane, a steering operation for steering in the traveling lane, and a braking operation for applying a brake in the traveling lane and controlling the own vehicle to perform the avoiding operation to avoid the obstacle. A collision estimator estimates presence or absence of a collision between the rear vehicle and the obstacle in a case in which the own vehicle performs the avoiding operation by one of the lane change operation and the steering operation. The operation controller determines the avoiding operation based on the estimated presence or absence of the collision.