A body sound analysis device includes: acquisition means (210, 220) that acquires information relating to a frequency corresponding to a prescribed feature of a spectrum of a body sound； shifting means (230) that shifts, according to the information relating to the frequency, a plurality of reference spectrums that are references for classifying body sounds, and acquires a frequency shift reference spectrum； and output means (240, 250) that outputs a ratio of a plurality of reference spectrums included in the body sounds on the basis of the body sounds and the frequency shift reference spectrum. According to this body sound analysis device, a plurality of types of sounds included in the body sounds can be favorably analyzed.
