To provide a driving support device and a driving support method capable of precisely detecting the state of a driver in a driving support device in a driving support device for supporting a driver according to the movement of the line of sight of the driver.

The driving support device 100 for supporting a driver based on the movement of the line of sight of a driver includes: a vehicle speed sensor 12 for detecting a vehicle speed; and a support determination means 14 for determining whether to support the driver based on the scale of the movement of the line of sight. The support determination means 14 suppresses the amounts of support by permitting the movement of the line of sight to be smaller according as the vehicle speed is small.