The dissatisfied call determination device includes disconnection time data indicating a time when a call between the first caller and the second caller is disconnected, and a start time and a plurality of utterance sections of the first caller in the call A time information acquisition unit for acquiring a plurality of utterance time data each indicating a termination time, and a plurality of utterances of the first caller based on the disconnection time data and the plurality of utterance time data acquired by the time information acquisition unit Among the sections, an interruption detection unit that detects an utterance period between the start time and the end time as an interruption utterance period, and an interruption utterance period detected by the interruption detection unit is a closing period of the call A closing determination unit that determines whether or not the call is located within the communication unit, and a determination result of the closing determination unit. It has a determination unit.
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