PROBLEM TO BE SOLVED: To provide a mental state estimation device for acquiring a physical amount that changes according to a mental state of an estimation object person that is output by a sensor installed in a member used by the estimation object person as state data that can estimate the mental state more accurately without forcing an interruption of work or the like on the object person, and without imposing a burden on the object person in acquiring the physical amount.SOLUTION: A mental state estimation device includes a feature amount calculation part 11 for calculating a feature amount by a time unit preset from state data, a feature amount holding part 12 for holding the feature amount calculated by the feature amount calculation part 11, and a mental state estimation part 13 for comparing a feature amount which is held by the feature amount holding part 12 and serves as a reference with the present feature amount calculated by the feature amount calculation part 11, and estimating a change in the mental state from a past point of time.COPYRIGHT: (C)2016,JPO&INPIT【課題】推定対象の人物が使用する部材に設置されたセンサが出力する、推定対象の人物の心的状態によって変化する物理量を状態データとして取得する心的状態推定装置で、対象となる人間に作業等の中断を強いず、物理量を取得するに際して負担をかけずに心的状態をより正確に推定すること。【解決手段】状態データから予め設定された時間単位での特徴量を算出する特徴量算出部１１と、特徴量算出部１１で算出した特徴量を保持する特徴量保持部１２と、心的状態推定部１３で保持する基準となる特徴量と特徴量算出部１１で算出する現在の特徴量とを比較し、過去時点からの心的状態の変化を推定する心的状態推定部１３とを備える。【選択図】図１
