To inhibit erroneous determination of a desultory driving condition.SOLUTION: A controller 10 that determines based on a frequency of a driver's discerning action whether a driver is in a desultory driving condition includes a frequency acquisition unit 33 that acquires the frequency of the discerning action in each of plural driver's discerning directions relative to an advancing direction of a vehicle, a driving condition determination unit 36 that determines based on the frequency in each of the discerning directions, which is acquired by the frequency acquisition unit 33, and a criterial value, which expresses a ratio of discerning actions in each of the discerning directions, whether the driver is in the desultory driving condition, a road information acquisition unit 34 that acquires road information concerning a type of road on which the vehicle travels, and a criterial value adjustment unit 35 that adjusts the criterial value on the basis of the road information acquired by the road information acquisition unit 34.SELECTED DRAWING: Figure 1【課題】漫然運転状態の誤判定を抑制する。【解決手段】運転者の視認行動の回数に基づいて漫然運転状態か否かを判定する制御装置１０は、車両の進行方向に対して運転者の複数の視認方向における視認行動の回数を取得する回数取得部３３と、回数取得部３３によって取得された各視認方向の回数と、各視認方向での視認行動の割合が定められた判定値とに基づいて、漫然運転状態であるか否かを判定する運転状態判定部３６と、車両が走行する道路の種別に関する道路情報を取得する道路情報取得部３４と、道路情報取得部３４によって取得された道路情報に基づいて、判定値を調整する判定値調整部３５と、を備える。【選択図】図１
