A driving support apparatus includes a collision time prediction unit that predicts a TTC and a TTV, a driving support determination unit that applies the TTC and TTV to a map and determines whether the driving support in the host vehicle is to be implemented or not, a driving support control unit that controls the driving support in the host vehicle, an extension mode determination unit that determines whether a speed of the moving object in a direction crossing the traveling direction is equal to or less than a first threshold value and whether the TTC is equal to or less than a second threshold value or not, and determines that the driving support is to be implemented in the host vehicle in a case where the above conditions are satisfied.