PROBLEM TO BE SOLVED: To provide a biological information detector capable of flexibly and easily performing adjustment of an attachment state, and the like.SOLUTION: A biological information detector includes: a case portion 30 provided with a biological information detection section 40 detecting biological information of an object body to be inspected a band portion 10 attaching the case portion 30 to the object body to be inspected and an adjustment mechanism 20 pulling up the band portion 10 in a first direction being a direction in which a surface of an object body to be inspected side of the case portion 30 is brought into close contact with the object body to be inspected when a rotary member 21 supported by the case portion 30 rotates.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】 装着状態の調整を柔軟且つ容易に行うことが可能な生体情報検出装置等を提供すること。【解決手段】 生体情報検出装置は、被検体の生体情報を検出する生体情報検出部40が設けられるケース部30と、ケース部30を被検体にとりつけるバンド部10と、ケース部30に支持される回転部材21が回転した場合に、ケース部30の被検体側の面を被検体に密着させる方向である第1の方向に、バンド部10を引き上げる調整機構20と、を含む。【選択図】 図2