An utterance condition determination device comprising: a backchannel frequency calculation unit (503, 513, 523, 534, 543) configured to calculate a backchannel frequency of a second speaker for each of a plurality of frames, a frame being a predetermined unit of time, based on a voice section detected from a first voice signal containing a voice of a first speaker and a backchannel section detected from a second voice signal containing a voice of the second speaker, the second speaker having a conversation with the first speaker, characterized in that the utterance condition determination device further comprises: an average backchannel frequency estimation unit (504, 514, 524, 536, 544) configured to estimate an average backchannel frequency for a conversation held when the second speaker is in a normal condition, based on the voice sections in the first voice signal and the backchannel sections of the second speaker in the second voice signal, that is achieved during a period that ranges from a voice start time of the second speaker to a prescribed number of frames; and a determination unit (505, 515, 525, 538, 546) configured to determine a satisfaction level of the second speaker in a frame based on the average backchannel frequency and the backchannel frequency of the second speaker in the frame. a backchannel frequency calculation unit (503, 513, 523, 534, 543) configured to calculate a backchannel frequency of a second speaker for each of a plurality of frames, a frame being a predetermined unit of time, based on a voice section detected from a first voice signal containing a voice of a first speaker and a backchannel section detected from a second voice signal containing a voice of the second speaker, the second speaker having a conversation with the first speaker, characterized in that the utterance condition determination device further comprises: an average backchannel frequency estimation unit (504, 514, 524, 536, 544) configured to estimate an average backchannel frequency for a conversation held when the second speaker is in a normal condition, based on the voice sections in the first voice signal and the backchannel sections of the second speaker in the second voice signal, that is achieved during a period that ranges from a voice start time of the second speaker to a prescribed number of frames; and a determination unit (505, 515, 525, 538, 546) configured to determine a satisfaction level of the second speaker in a frame based on the average backchannel frequency and the backchannel frequency of the second speaker in the frame. an average backchannel frequency estimation unit (504, 514, 524, 536, 544) configured to estimate an average backchannel frequency for a conversation held when the second speaker is in a normal condition, based on the voice sections in the first voice signal and the backchannel sections of the second speaker in the second voice signal, that is achieved during a period that ranges from a voice start time of the second speaker to a prescribed number of frames; and a determination unit (505, 515, 525, 538, 546) configured to determine a satisfaction level of the second speaker in a frame based on the average backchannel frequency and the backchannel frequency of the second speaker in the frame.