Driving Assistance Method and Driving Assistance Device

A driving assistance method includes: extracting a high difficulty point where autonomous driving is difficult on a planned travel route of a host vehicle; determining, at a point located at a predetermined distance or more before the high difficulty point, whether or not a following vehicle traveling on the same lane as a lane of the host vehicle is present within a predetermined range from the host vehicle; and guiding switching of a traveling state of the host vehicle from autonomous driving to manual driving when the following vehicle is present within the predetermined range from the host vehicle.