DRIVING SUPPORT DEVICE AND DRIVING SUPPORT METHOD

A driving assistance device detects an object in front of a vehicle by an object detector, detects right/left turn information indicating that the vehicle passes across an opposite lane to turn right or left at an intersection after a predetermined period of time based on a current position and a traveling route of the vehicle included in road information, determines whether a standby vehicle waiting to turn right or left in the opposite lane is present in the intersection according to a detection result of the object detector and the road information when the right/left turn information is detected, estimates a blind spot of the object detector in the opposite lane caused by the standby vehicle, and sets a standby area in which the vehicle waits to turn right or left based on the estimated blind spot.