The body sound acquisition device (1) includes a first member (21), an acquisition unit (11) that acquires body sound, and an internal space (24) that is connected to the first member and is formed inside together with the first member. ) In which the 2nd member (22) holding an acquisition part is provided, and each of the 1st and 2nd member connects the external space (25) of the 1st and 2nd member with the internal space (). 214, 224).生体音取得装置（１）は、第１部材（２１）と、生体音を取得する取得部（１１）と、第１部材に接続され、且つ、第１部材と共に内部に形成する内部空間（２４）内に取得部を保持する第２部材（２２）とを備え、第１及び第２部材の夫々は、第１及び第２部材の外部空間（２５）と内部空間とを連絡させる連絡部（２１４、２２４）を有する。
