PROBLEM TO BE SOLVED: To suppress influence of stray light on a biosensor including a light emitting part and a light receiving part.SOLUTION: The biosensor includes: substrates 21 and 22 with translucency the light emitting part 24 disposed on the rear surface of the substrate 22 to irradiate a subject with light sequentially via the substrates 22 and 21 the light receiving part 26 disposed on a surface of the substrate 21 which faces the subject with a light receiving surface turned toward the subject to output a signal according to the light received from the subject and a shading part 27 formed in such a way as to cover the light receiving part 26 excluding an opening 27a in the inner peripheral edge of the light receiving surface 26a as seen from the top.COPYRIGHT: (C)2013,JPO&INPIT【課題】発光部と受光部とを備える生体センサーにおいて迷光の影響を低く抑える。【解決手段】光透過性を有する基板21、22と、被験体に、基板22の裏面に設けられ、基板22、21を順に介して光を照射する発光部24と、基板21のうち被験体との対向面側に、受光面を被験体に向けて設けられ、被験体からの受光に応じた信号を出力する受光部26と、平面視したときに受光面26aの内周縁部での開口部27aを除き、受光部26のを覆うように形成された遮光部27とを具備する。【選択図】図4
