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 a movable mechanism 20 pushing out the biological information detection section 40 in a first direction being a direction from the case portion 30 toward the object body to be inspected in a state of the case portion 30 being attached to the object body to be inspected when a rotary member 21 (rotary bezel 22) rotates in a first rotation direction.SELECTED DRAWING: Figure 3COPYRIGHT: (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、回転部材21(回転ベゼル22)が第1の回転方向に回転した場合に、ケース部30が被検体に装着された状態においてケース部30から被検体に向かう方向である第1の方向に、生体情報検出部40を押し出す可動機構20と、を含む。【選択図】 図3