PROBLEM TO BE SOLVED: To provide a biological information detector that measures accurate biological information by reducing an amount of fluctuation in body motion noise even when a measurement state changes.SOLUTION: A biological information detector includes a first light receiving part 141, a second light receiving part 142, a third light receiving part 143, at least one light emitting part 150, a base plate 160, and a translucent member 50 that comes into contact with a subject when biological information on the subject is measured. When a distance between the light emitting part 150 and the second light receiving part 142 is represented by L2, and a distance between the light emitting part 150 and the third light receiving part 143 is represented by L3, the relationship of L3>；L2 is satisfied. When distances from the base plate 160 to the surface of the translucent member 50 that comes into contact with the subject in areas where the translucent member 50 overlaps the first light receiving part 141, the second light receiving part 142, and the third light receiving part 143 in a plane view in a direction DR1 from the biological information detector to the subject are represented by h1, h2, and h3 respectively, the relationship of h1>；h2 and h1>；h3 is satisfied.SELECTED DRAWING: Figure 3【課題】測定状態が変化しても体動ノイズの変動量を少なくして正確な生体情報を測定する生体情報検出装置を提供する。【解決手段】生体情報検出装置は、第１の受光部１４１と、第２の受光部１４２と、第３の受光部１４３と、少なくとも１つの発光部１５０と、基板１６０と、被検体の生体情報の測定時に被検体に接触する透光部材５０と、を含む。発光部１５０と第２の受光部１４２との距離をＬ２とし、発光部１５０と第３の受光部１４３との距離をＬ３とした場合に、Ｌ３＞Ｌ２である。生体情報検出装置から被検体への方向ＤＲ１における平面視において、透光部材５０と第１の受光部１４１、第２の受光部１４２、第３の受光部１４３とが重なる領域での基板１６０から透光部材５０の被検体に接触する面までの距離を、それぞれｈ１、ｈ２、ｈ３とした場合に、ｈ１＞ｈ２、ｈ１＞ｈ３である。【選択図】図３
