PROBLEM TO BE SOLVED: To suitably analyze continuous rhonchus contained in respiratory sounds.SOLUTION: The respiratory sound analysis apparatus comprises: component acquisition means (210, 220) for acquiring at a predetermined interval a respiratory sound component which contains continuous rhonchus； frequency acquisition means (230) for acquiring the frequency corresponding to a specific characteristic contained in the respiratory sound component； determination means (240) for determining at a predetermined interval a whistling rale component and a rhonchus component contained in the respiratory sound component on the basis of a relationship between the frequency corresponding to the specific characteristic and a predetermined threshold value； and adjustment means (250, 260) for adjusting the predetermined threshold value on the basis of a past determination result of the determination means.【課題】呼吸音に含まれる連続性ラ音を好適に解析する。【解決手段】呼吸音解析装置は、呼吸音から所定の時間間隔で連続性ラ音を含む呼吸音成分を取得する成分取得手段（２１０，２２０）と、呼吸音成分に含まれる所定の特徴に対応する周波数を取得する周波数取得手段（２３０）と、所定の時間間隔ごとに、所定の特徴に対応する周波数と所定の閾値との関係に基づいて、呼吸音成分に含まれる笛声音成分と類鼾音成分とを判定する判定手段（２４０）と、判定手段による過去の判定結果に基づいて、所定の閾値を調整する調整手段（２５０，２６０）とを備える。【選択図】図２
