Driving Assistance Method and Driving Assistance Device

A driving assistance method for performing a lane change of an own vehicle by autonomous travel control includes: calculating a target route along which the own vehicle is caused to travel to a destination; determining whether or not multiple lane changes are required to be performed successively for the own vehicle to travel in accordance with the target route; determining 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.