This cause-effect sentence analysis device is provided with: a cause-effect sentence extraction unit that extracts a cause-effect sentence including a cause expression and an effect expression from a text; an acquisition unit that acquires information indicating a reference expression serving as a reference for analyzing the degree of similarity; a similarity degree analysis unit that, for a cause-effect sentence extracted by the cause-effect sentence extraction unit, calculates a cause similarity degree, namely, the degree of similarity between the reference expression and the cause expression included in the cause-effect sentence, and an effect similarity degree, namely, the degree of similarity between the reference expression and the effect expression included in the cause-effect sentence; and a desired cause-effect sentence extraction unit for extracting a cause-effect sentence in which one of the cause expression and the effect expression included in the cause-effect sentence is similar to the reference expression and the other is not similar to the reference expression.
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