DRIVING ASSISTANCE DEVICE AND DRIVING ASSISTANCE METHOD

When the vehicle reaches the deceleration position where the driver performs the deceleration operation, the driving assistance device executes deceleration control for automatically decelerating the vehicle. The driving assistance device adds a larger score to the learning score of the deceleration position than the case where it is determined that the deceleration operation is performed due to the deceleration request object provided in front of the deceleration position and the vehicle needs to decelerate, and the deceleration operation is not performed due to the deceleration request object, on the basis of the environment in front of the vehicle when the driver performs the deceleration operation, and executes the deceleration control when the learning score of the deceleration position reached by the vehicle is equal to or larger than the threshold value.