A biological-information measuring apparatus includes an informing unit that informs a subject whose biological information is to be measured of a reference rhythm that is predetermined as a rhythm suitable for measurement of the biological information, a measured value of which varies in accordance with a breathing state of the subject, in such a manner that a breathing rhythm of the subject becomes close to the reference rhythm and a measuring unit that measures the biological information of the subject who performs breathing to the reference rhythm, which is given to the subject by the informing unit.
