An object of the present invention is to provide a voice analysis device, a voice analysis method, a voice analysis program, and a voice analysis system that can output information for performing an analysis based on a time change of a speech amount of a participant in a discussion. The voice analysis device 100 according to an embodiment of the present invention includes a voice acquisition unit 112 that obtains voices uttered by a plurality of participants, and an analysis unit that specifies the amount of speech of each of the plurality of participants at each time in voice. 114, a section setting unit 115 for setting a section in the voice based on the input from the user, a graph in which the time changes of the utterance amounts of a plurality of participants are stacked together, and information indicating the section in the graph. And an output unit 116.
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