A method for supporting driving of a vehicle includes: a step of performing departure preventing control including steering control for preventing the vehicle from departing from a driving lane for the vehicle; and a step of starting, when an operative condition for risk avoiding control including steering control for avoiding a risk factor ahead of the vehicle is satisfied during performance of the departure preventing control, the risk avoiding control from an end timing of the departure preventing control. The operative condition for the risk avoiding control includes that a longitudinal distance from the vehicle to the risk factor is not more than a reference distance. The method further includes a step of expanding the reference distance during performance of the departure preventing control.