Driver certifying system

The driver certifying system according to the present invention comprises an iris pattern acquiring means (11) for acquiring iris pattern of a driver who sits on a driver's seat of a vehicle, a driver certifying means (12) for certifying whether or not the driver is an authentic driver by comparing the iris pattern with registered iris pattern of the authentic driver, and a function activating means (13) for activating at least one function equipped in the vehicle, when the driver is certified as the authentic driver, wherein the iris pattern acquiring means (11) is arranged in the ceiling of the vehicle. The distance between the iris of the driver and the iris pattern acquiring means (11) may be adjusted, e.g. by moving the driver's seat.