A driving support apparatus for setting a traveling lane in which a vehicle can travel on the basis of a road marking to indicate a lane boundary or a traveling-prohibited region and performing support by combining steering of the vehicle and deceleration of the vehicle so that the vehicle is allowed to travel in the traveling lane if the vehicle is to be departed from the traveling lane, wherein the driving support apparatus is configured to: individually control the steering of the vehicle and the deceleration of the vehicle, which are to be performed when the support is performed so that the vehicle is allowed to travel in the traveling lane, by selecting: only the steering of the vehicle is performed without performing the deceleration of the vehicle (S104, S204) when the support is performed so that the vehicle is allowed to travel in the traveling lane if the difference between a target value of a parameter which indicates the lateral movement in order not to allow the vehicle to exceed the traveling lane and an actual value of the parameter is smaller than a first threshold value if the actual value is smaller than the target value of the parameter; and the steering of the vehicle and the deceleration of the vehicle are performed simultaneously (S106, S206)if the difference is not less than the first threshold value if the actual value of the parameter is smaller than the target value of the parameter; characterised in that: the driving support apparatus is configured to select that the steering of the vehicle and the deceleration of the vehicle are performed simultaneously (S106, S206) if the difference is not less than the first threshold value and smaller than the second threshold value if the actual value of the parameter is smaller than the target value of the parameter; and the driving support apparatus is configured to select the steering of the vehicle is performed after previously decelerating the vehicle (S107; S207)if the difference is not less than the second threshold value if the actual value of the parameter is smaller than the target value of the parameter. only the steering of the vehicle is performed without performing the deceleration of the vehicle (S104, S204) when the support is performed so that the vehicle is allowed to travel in the traveling lane if the difference between a target value of a parameter which indicates the lateral movement in order not to allow the vehicle to exceed the traveling lane and an actual value of the parameter is smaller than a first threshold value if the actual value is smaller than the target value of the parameter; and the steering of the vehicle and the deceleration of the vehicle are performed simultaneously (S106, S206)if the difference is not less than the first threshold value if the actual value of the parameter is smaller than the target value of the parameter; characterised in that: the driving support apparatus is configured to select that the steering of the vehicle and the deceleration of the vehicle are performed simultaneously (S106, S206) if the difference is not less than the first threshold value and smaller than the second threshold value if the actual value of the parameter is smaller than the target value of the parameter; and the driving support apparatus is configured to select the steering of the vehicle is performed after previously decelerating the vehicle (S107; S207)if the difference is not less than the second threshold value if the actual value of the parameter is smaller than the target value of the parameter. the driving support apparatus is configured to select that the steering of the vehicle and the deceleration of the vehicle are performed simultaneously (S106, S206) if the difference is not less than the first threshold value and smaller than the second threshold value if the actual value of the parameter is smaller than the target value of the parameter; and the driving support apparatus is configured to select the steering of the vehicle is performed after previously decelerating the vehicle (S107; S207)if the difference is not less than the second threshold value if the actual value of the parameter is smaller than the target value of the parameter.