DRIVING ASSISTANCE METHOD AND DRIVING ASSISTANCE DEVICE

To provide a driving assist method that can reduce the possibility of missing an opportunity to correct a host vehicle position set on map data. In a driving assist method using a position mode controller 40 that sets a target inter-vehicular distance from a host vehicle to a preceding vehicle, whether there is a request to execute a correction of a host vehicle position set on electronic map data is determined based on a result of comparing position information on a road sign described on the electronic map data with position information on the road sign acquired by using a camera (11) installed in the host vehicle. If an execution request has not been made, the target inter-vehicular distance is set to a preset first target inter-vehicular distance. If an execution request has been made, the target inter-vehicular distance is set to a second target inter-vehicular distance, which is longer than the first target inter-vehicular distance.