This cognitive function evaluation device (100) is provided with: an acquisition unit (110) which acquires, as gait data, at least one among first data that indicates a shaking amount of the body during walking of a person to be evaluated (U) in a first walking section which is a section until the prescribed number of walks is reached after the person to be evaluated (U) starts walking, and second data that indicates a shaking amount of the body during walking of the person to be evaluated (U) in a double task state in which the person to be evaluated (U) walks while performing a given assignment in a second walking section after the first walking section； a calculation unit (120) which calculates, from the gait data acquired by the acquisition unit (110), a feature amount based on the gait data； an evaluation unit (130) which evaluates a cognitive function of the person to be evaluated (U) on the basis of the feature amount calculated by the calculation unit (120)； and an output unit (140) which outputs the evaluation result evaluated by the evaluation unit (130).本發明提供一種可精度良好地評價認知機能之認知機能評價裝置等。認知機能評價裝置100具備：取得部110，其取得表示自被評價者U開始步行至規定步數為止之第1步行區間中之被評價者U步行中之身體擺動量的第1資料、及表示第1步行區間以後之第2步行區間中之被評價者U一面履行被賦予之課題一面步行之雙重任務狀態下的被評價者U步行中之身體擺動量之第2資料的至少一者作為步態資料；算出部120，其根據取得部110所取得之步態資料，算出基於該步態資料之特徵量；評價部130，其基於算出部120所算出之特徵量，評價被評價者U之認知機能；及輸出部140，其輸出評價部130所評價之評價結果。
