To provide a biological state estimating apparatus capable of estimating the biological condition of a driver with high accuracy.A physiological information detecting section 2 having a physiological information feature amount calculating section 22 for calculating a physiological information feature amount on the basis of physiological information of a driver 11 acquired by a sensor 21, a physiological information detecting section 2 of a camera 31 for imaging the face of the driver 11 A facial expression detecting unit 3 having a facial expression feature amount computing unit 32 for computing a facial expression feature amount based on facial expression information extracted from the captured image, A state estimating unit 4 for estimating a state and a physical stimulus generating unit 5 for generating a physical stimulus to the driver 11. The state estimating unit 4 causes the physical stimulus generating unit 5 to generate a physical stimulus, , The amount of change in the physiological information feature amount and the amount of change in the facial expression feature amount are acquired and weighting is applied to the physiological information feature amount and the facial expression feature amount at the time of estimating the state of the driver 11 .BACKGROUND OF THE INVENTION【課題】ドライバの生体状態を高精度に推定可能な生体状態推定装置を提供する。【解決手段】センサ21で取得したドライバ11の生理情報を基に生理情報特徴量を演算する生理情報特徴量演算部22を有する生理情報検出部2と、ドライバ11の顔を撮像するカメラ31の撮像画像から抽出した顔表情情報を基に顔表情特徴量を演算する顔表情特徴量演算部32を有する顔表情検出部3と、生理情報特徴量と顔表情特徴量とを基にドライバ11の状態を推定する状態推定部4と、ドライバ11への物理刺激を発生させる物理刺激発生部5と、を備え、状態推定部4は、物理刺激発生部5により物理刺激を発生させ、当該物理刺激の前後の生理情報特徴量の変化量及び顔表情特徴量の変化量を取得し、それら変化量を基に、ドライバ11の状態の推定の際に生理情報特徴量と顔表情特徴量に重み付けを行う。【選択図】図1
