PROBLEM TO BE SOLVED: To provide a bio-information acquisition apparatus capable of stably acquiring a bio-information even if the electrode of an attachment belt is detached from the body.SOLUTION: This is a bio-information acquisition apparatus which is attached to the body with an attachment belt. The apparatus includes: a first electrode (earth electrode 1), a second electrode (cardiac potential detection electrode 2), and a third electrode (attachment detection electrode 3) a signal processing part (signal processing part 4) for amplifying a signal generated between the first and the second electrodes and an attachment detector(attachment detector 5) that detects the attachment belt being attached to the body by a signal generated between the first and the third electrodes and that supplies an operation voltage to the signal processing part.COPYRIGHT: (C)2014,JPO&INPIT【課題】装着ベルトの電極が身体から離れても安定して生体情報を取得できる生体情報取得装置を提供する。【解決手段】装着ベルトによって身体に装着される生体情報取得装置であって、第1電極(アース電極1)、第2電極(心電位検出電極2)、及び第3電極(装着検出電極3)と、第1電極と第2電極との間に発生する信号を増幅する信号処理部(信号処理部4)と、第1電極と第3電極との間に発生する信号によって装着ベルトが身体に装着されたことを検出し、信号処理部へ動作電圧を供給する装着検出部(装着検出部5)と、を備える。【選択図】図2