A human-state estimating method includes: obtaining a thermal sensation index obtained by indexing, in a specified range, an estimated thermal sensation of a person； determining whether or not the obtained thermal sensation index is in a predetermined range in the specified range； and estimating a human state, which is a state of the person, based on a physiological amount in which an activity of an autonomic nervous system of the person is reflected, the physiological amount being obtained when it is determined that the obtained thermal sensation index is in the predetermined range.
