Drive assist apparatus for vehicle

A drive assist apparatus for a vehicle includes: a driving environment recognizer recognizing driving environment information on outside of the vehicle; a target vehicle-to-vehicle distance setter setting a target preceding vehicle distance to a preceding vehicle; and a driving controller performing driving control for maintaining a preceding vehicle distance at the target preceding vehicle distance. When a vehicle driving path is congested, the target vehicle-to-vehicle distance setter sets an extended target preceding vehicle distance and a target following vehicle distance. When the vehicle driving path is congested, the driving controller calculates a target acceleration for maintaining a following vehicle distance at the target following vehicle distance, determines whether to permit acceleration or deceleration, performs acceleration control when the target acceleration is an acceleration-side value and acceleration is permitted, and performs deceleration control when the target acceleration is a deceleration-side value and deceleration is permitted.