PROBLEM TO BE SOLVED: To provide technology which estimates an unpleasant emotion with high accuracy, even when information concerning voice and behavior cannot be acquired.SOLUTION: An unpleasant emotion estimation apparatus is provided for estimating unpleasant emotion of a subject. The unpleasant emotion estimation apparatus has: a history learning unit for creating a learning model in which the variation of first living body data formed by acquiring the living body data of a first subject in time-series is associated with an observation result obtained by observing a sedation degree being an unpleasant factor of the first subject and a degree of pain in time-series； and an estimator having a discomfort index calculation unit for estimating the unpleasant degree of a second subject, on the basis of second living body data of the second subject and the learning model.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】音声や行動に関する情報を取得することができない場合においても、不快感情を精度良く推定する技術を提供する。【解決手段】被験者の不快感情を推定する不快感情推定装置であって、第１の被験者の生体データを時系列で取得した第１の生体データの変動量と、前記第１の被験者の不快要因である鎮静度と痛みの度合いとを時系列で観察した観察結果と、を対応付けした学習モデルを作成する履歴学習部と、第２の被験者の第２の生体データと前記学習モデルとに基づいて、前記第２の被験者の不快度を推定する不快指数計算部を有する推定器と、を有することを特徴とする不快指数推定装置。【選択図】図１
