An object of the present invention is to provide a living body optical measurement device that grasps a brain activity state obtained by a living body optical measurement technique and a reaction or relationship related to an emotion and feeds back to a subject who is a subject. A biological light measurement device includes a light irradiation unit that irradiates light to a head of a subject, and a plurality of light receiving units that are arranged at different distances from the light irradiation unit and detect light transmitted or reflected by the subject. An arithmetic unit that separates a brain signal and a physiological signal of the subject based on the intensity of light received by the plurality of light receiving units, and an output unit that outputs the brain signal and the physiological signal separated by the arithmetic unit And [Selection diagram] Fig. 1【課題】 生体光計測技術によって得られる脳の活動状態と、情動に関連した反応や関係性を把握し、被検体である対象者にフィードバックする生体光計測装置を提供する。【解決手段】 生体光計測装置は、被検体の頭部に光を照射する光照射部と、光照射部から異なる距離に配置され、被検体を透過あるいは反射した光を検出する複数の受光部と、複数の受光部で受光された光の強度に基づいて、被検体の脳信号と生理信号に分離する演算部と、演算部にて分離された、脳信号と生理信号を出力する出力部とを有する。【選択図】 図１
