To provide a biological information acquisition unit capable of acquiring biological information even if a wearable biological information acquisition device is detached from a subject while having a relatively simple constitution.SOLUTION: The biological information acquiring apparatus includes a first hollow member (31) configured to be wearable to a subject and to which a body motion of the subject works, and a second hollow member (31) configured to detect a pressure of the first hollow member A signal processing unit (51) for acquiring the biological information of the subject based on the pressure sensor (32), the pressure signal detected by the pressure sensor (32), and a second hollow member (40) capable of communicating with the pressure sensor (32) are provided.(FIG.【課題】比較的簡素な構成でありながら、装着式の生体情報取得装置を対象者から取り外したとしても、生体情報を取得できる生体情報取得ユニットを提供する。【解決手段】生体情報取得装置には、対象者に装着可能に構成され、該対象者の体動が作用する第1中空部材(31)と、第1中空部材(31)の圧力を検出する圧力センサ(32)と、圧力センサ(32)で検出した圧力信号に基づいて対象者の生体情報を取得する信号処理部(51)と、所定の対象物(5)に設けられる第2中空部材(74)と、上記圧力センサ(32)とを連通可能な連通路(40)とが設けられる。【選択図】図2
