PROBLEM TO BE SOLVED: To provide a biological information acquisition device capable of simply measuring an index showing the degree of tightness of a wearing article on a subject.SOLUTION: The biological information acquisition device comprises: a hollow pressure sensitive tube (20) a pressure sensor (31) for detecting the inner pressure of the pressure sensitive tube (20) a biological signal extraction part (40) for extracting biological signals of a subject (1) from signals detected by the pressure sensor (31) and a derivation part (60) which obtains indexes showing the degree of the tightness of wearing articles (6, 7) on the subject (1) on the basis of the amplitudes of the biological signal.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】対象者に対する装着品のきつさの度合いを示す指標を簡便に計測できる生体情報取得装置を提案する。【解決手段】生体情報取得装置には、中空状の感圧チューブ(20)と、感圧チューブ(20)の内圧を検出する圧力センサ(31)と、圧力センサ(31)の検出信号から上記対象者(1)の生体信号を抽出する生体信号抽出部(40)と、生体信号の振幅に基づいて上記対象者(1)に対する上記装着品(6,7)のきつさの度合いを示す指標を求める導出部(60)とが設けられる。【選択図】図3