To improve biological sound measurement accuracy by accurately determining whether or not one or both of a state of contact between a member and a body surface of a living body, and a contact position of a device with respect to the body surface satisfies a condition required for measuring a biological sound.SOLUTION: A biological sound measuring device 1 having a housing 31 for forming a storage space SP1 sealed by a body surface S in a state of being pressed against the body surface S for measuring a biological sound of a living body on the basis of a pressure variation in the storage space SP1 includes: a sound producing part 35 arranged in the storage space SP1； a sound measuring part 36 arranged in the storage space SP1 for measuring a reflection sound of a sound produced by the sound producing part 35； and a control part 4 for determining whether or not a contact state or a contact position of the housing 31 with respect to the body surface S is appropriate on the basis of the reflection sound measured by the sound measuring part 36, and, when it determines that the contact state and the contact position are not appropriate, notifying accordingly.SELECTED DRAWING: Figure 7【課題】生体の体表面との接触状態及びこの体表面に対する装置の接触位置の一方又は両方が生体音の測定に必要な条件を満たすか否かを高精度に判定して、生体音の測定精度の向上を図る。【解決手段】体表面Ｓに押圧された状態にて体表面Ｓによって密閉される収容空間ＳＰ１を形成するハウジング３１を有し、収容空間ＳＰ１の圧力変動に基づいて生体の生体音を測定する生体音測定装置１は、収容空間ＳＰ１に配置された発音部３５と、発音部３５から発生された音の反射音を測定する収容空間ＳＰ１に配置された測音部３６と、測音部３６により測定された反射音に基づいて、体表面Ｓに対するハウジング３１の接触状態又は接触位置が良好か否かを判定し、良好ではないと判定した場合に報知を行う制御部４と、を備える。【選択図】図７
