To determine whether an organism is such an organism from which a particular biological sound can be detected, in a biological sound detection device for detecting a particular biological sound from an organism.SOLUTION: A biological sound detection device (10) for detecting a particular biological sound from an organism includes: a biological sound sensor (41) for detecting a biological sound of an organism； and an adjustment sound propagation device (20) for echoing an adjustment sound that is detected by the biological sound detection device (10) as a particular biological sound, inside an organism.SELECTED DRAWING: Figure 1【課題】生体から特定の生体音を検出する生体音検出装置において、当該生体が、当該特定の生体音の検出が可能な生体か否かの判別を可能にする。【解決手段】生体から特定の生体音を検出する生体音検出装置（１０）は、生体の生体音を検知する生体音センサ（４１）と、生体音検出装置（１０）によって特定の生体音として検出される調整音を生体内に響かせる調整音伝播装置（２０）と、を備えている。【選択図】図１
