driver condition determining apparatus according to the present invention, a meandering detecting unit for detecting a meandering degree per reference time C of the vehicle, and lowering of consciousness determination unit determines whether the awareness of the driver of the vehicle is reduced, and a control unit for controlling the operation of lowering of consciousness determination unit to be less likely to be determined as the awareness decrease is large meandering degree detected by the meandering detecting unit.本発明に係るドライバ状態判定装置は、車両の基準時間Cあたりの蛇行度合いを検出する蛇行検出部と、車両のドライバの意識が低下したか否かを判定する意識低下判定部と、蛇行検出部により検出された蛇行度合いが大きいほど意識低下と判定されにくくなるように意識低下判定部の作動を制御する制御部とを備える。
