A driving support apparatus for a vehicle includes a lane keeping assist control unit configured to perform a lane keeping assist control, and a lane change assist control unit configured to perform a lane change assist control. When a reliability with respect to a recognition result of lane lines is a predetermined level, the lane keeping assist control unit lowers a responsiveness of the lane keeping assist control, compared with the responsiveness of the lane keeping assist control when the reliability is a level higher than the predetermined level. When the reliability is a level lower than the predetermined level, the lane change assist control unit lowers a responsiveness of the lane change assist control, compared with the responsiveness of the lane change assist control when the reliability is the predetermined level.