DRIVER CONDITION ASSESSMENT DEVICE

Disclosed is invention, a driver condition assessment device 1 that assesses a driver condition of a host vehicle by assessing whether a predetermined driving operation is performed, includes travelling condition detection means for detecting a travelling condition of the host vehicle; size detection means for detecting a size of a preceding vehicle present ahead of the host vehicle; consciousness degradation assessment means for assessing whether a consciousness of a driver of the host vehicle is degraded when a travelling condition detected by the travelling condition detection means exceeds a predetermined threshold value; and threshold value setting means for setting the predetermined threshold value depending on the size of the preceding vehicle detected by the size detection means.