A physiological sound examination device which supports estimation of a state of a living body includes: a first physiological sound measurement unit (101) a second physiological sound measurement unit (102) a power ratio calculation unit (304) which calculates a power ratio which is a ratio of first physiological sound signal power to second physiological sound signal power an illness-related gain calculation unit (305) which calculates a transfer-characteristic of the physiological sound in the living body by computing the power ratio a power calculation unit (301) which calculates first power which is the second physiological sound signal power in a first frequency band and an illness-related high frequency power ratio calculation unit (303) which calculates a sound-source-characteristic of the physiological sound by computing the first power. The computing is performed to reduce an influence of the respiratory flow velocity and/or the size of the living body.
