PROBLEM TO BE SOLVED: To provide a biological information detector or the like capable of realizing an appropriate light shield structure or the like in a configuration provided with a plurality of reception sections.SOLUTION: A biological information detector includes: a light emission section 150 emitting light to an inspection object; a first reception sections 141 receiving the light from the inspection object; a second reception sections 142 receiving the light from the inspection object; and a beam portion 76 provided between the first reception sections 141 and the second reception sections 142 in a plan view in a vertical direction (DR4 direction) of a light receiving surface RS1 of the first reception sections 141.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2016,JPO&INPIT【課題】複数の受光部を設けた構成において適正な遮光構造等を実現できる生体情報検出装置等の提供。【解決手段】生体情報検出装置は、被検体に対して光を出射する発光部150と、被検体からの光を受光する第1の受光部141と、被検体からの光を受光する第2の受光部142と、第1の受光部141の受光面RS1の垂直方向(DR4方向)からの平面視において、第1の受光部141と第2の受光部142との間に設けられる梁部76を含む。【選択図】図4