An emotion estimation device includes: an image obtaining unit that obtains plural images in which an object person is photographed in time series； an expression recognizer that recognizes an expression of the object person from each of the plural images obtained by the image obtaining unit； a storage in which expression recognition results of the plural images are stored as time-series data； and an emotion estimator that detects a feature associated with a time change of the expression of the object person from the time-series data stored in the storage in an estimation target period, and estimates the emotion of the object person in the estimation target period based on the detected feature.
