A drive assist apparatus for a vehicle includes one or more processors configured to: obtain a risk degree calculated for an oncoming moving body moving with a velocity component in a direction opposite to a traveling direction of the vehicle in the oncoming moving body on an oncoming lane adjoining a traveling lane of the vehicle, based on a light emission pattern of a light source unit provided in the oncoming moving body; perform, upon determining that the vehicle is highly likely to come into collision with an obstacle, emergency collision avoidance control for avoiding the collision; and recognize the oncoming moving body as the obstacle according to the risk degree and perform, prior to the emergency collision avoidance control, preliminary collision avoidance control for the oncoming moving body.