A driving support device wherein an own vehicle and a peripheral vehicle are symbolized, and relative dispositions are displayed in real time in a display unit visible to the driver, is obtained to facilitate a lane change by a driver. The driving support device includes a vehicle detecting unit, which detects peripheral vehicles positioned in a periphery of a vehicle, and an image generating unit, which generates an image representing positions of the vehicle and the peripheral vehicles from vehicle information obtained by the vehicle detecting unit. The image generating unit generates a driving support image including vehicle information representing relative dispositions of the vehicle and the peripheral vehicles using symbols indicating the vehicle and the peripheral vehicles. The image generating unit includes an image stacking unit, which generates original data of the driving support image, and an image control unit, which cuts a necessary portion from the original data.