DRIVING ASSISTANCE METHOD AND DRIVING ASSISTANCE DEVICE

A driving assistance method for performing a lane change of an own vehicle (1) by autonomous travel control, the driving assistance method including: calculating a target route along which the own vehicle (1) is caused to travel to a destination; determining (S3, S8) whether or not multiple lane changes are required to be performed successively for the own vehicle (1) to travel in accordance with the target route; determining (S6, S9) whether or not the lane change is performed by the autonomous travel control; and when a determination that, in a second or later lane changes among the multiple lane changes, a lane change is not performed by the autonomous travel control is included, not performing a first lane change by the autonomous travel control (S10).