Evaluation apparatus of the human mental state

Evaluating apparatus 100, the communication between the plurality of subjects 2, to evaluate the relationship between the subject 2. Nonverbal information measuring unit 10 includes a plurality of subjects 2a, 2b each of nonverbal S0a, observing S0b, for each of a plurality of subjects, the first signal S1a is time series signal nonverbal information obtained by digitizing, S 1 b to generate. Waveform analyzing unit 22, based on the first signal S1a obtained for each of the plurality of subjects, the S 1 b, a second signal S2a is a quantity related to the characteristics of a plurality of subjects 2a, as 2b rhythm of each nonverbal , to generate the S2b. The relationship evaluation unit 24, a plurality of second signal S2a corresponding to a plurality of subjects, based on the relative relationship S2b, the third signal is an index indicating the mental condition involving the relationship between the plurality of subjects S3 to generate.