Driver fatigue level estimation apparatus and the driver fatigue estimation method

Biometric information value acquisition unit for acquiring biological information value is a value indicating the biometric information of the driver of the vehicle and (2), a vehicle speed detector for detecting the speed of the vehicle (4), the biological information value acquisition unit (2) based on the vehicle speed but which is detected by the acquired biometric information value and the vehicle speed detecting section (4), the biological information value reaches a peak value increases than before the start deceleration of the vehicle after the start of deceleration of the vehicle is reduced stop of the vehicle after detecting a stable value convergence change degree is a degree of change until the preset stable value in a stable value convergence change degree detecting section (20), stable value convergence change degree detecting section (20) is stabilized value convergence detected depending on the degree of change, including the fatigue level estimation unit for estimating a fatigue level of the driver (22).