A biological-information evaluating device according to an embodiment of the present disclosure includes a signal processing circuit that generates a feature value of an observation target waveform for each of pieces of observation data obtained through observation of a living body for a predetermined period, on a basis of a plurality of pieces of partial observation data contained in each of the pieces of observation data and each having a period shorter than an observation period of the observation data. An observation target of this biological-information evaluating device includes, for example, a human or an animal.
