A feature amount extraction device (100) is provided with: a data acquisition unit (110) that acquires time-sequential data as input time-sequential data (D1); a multiple-filter application unit (120) that has a plurality of digital filters, applies each of the digital filters to the input time-sequential data (D1) acquired by the data acquisition unit (110) , and outputs, for each of the digital filters, filter response time-sequential data (D5) which is time-sequential data including a time-sequential feature or a frequency feature and having undergone the application; and a feature amount extraction unit (130) that, for a plurality of pieces of the filter time-sequential data (D5) outputted from the multiple-filter application unit (120), extracts feature amounts for the respective pieces of filter response time-sequential data (D5), and outputs the extracted feature amounts as feature amount data (D2).
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