It is possible to reduce stray light received by the light without passing through the living body without causing size, and provides a biosensor capable of improving the reliability. biometric sensor (100) includes a wiring board (110), the main surface (110 a) of the wiring board (110), the light emitting element (121) mounted at predetermined intervals and a light receiving element (122 ) and, sealing a light-emitting device section having only formed a translucent top of the mounting region of the light emitting element (121) and (131), light transmission, which is formed only on the top of the mounting region of the light receiving element (122) light receiving element sealing portion having sex with (132), formed on the main surface (110 a) of the wiring board (110), sealing a light-emitting device section (131) and the light-receiving element encapsulation section (132) each surrounding, and comprises light shielding portion provided between the light emitting element sealing portion (131) and the light receiving element sealing portion (132) and (133).大型化を招くことなく生体を透過せずに受光される迷光を低減することができ、かつ、信頼性を向上することが可能な生体センサを提供する。 生体センサ(100)は、配線基板(110)と、配線基板(110)の主面(110a)に、所定の間隔を空けて実装された発光素子(121)及び受光素子(122)と、発光素子(121)の実装領域の上部のみに形成された透光性を有する発光素子封止部(131)と、受光素子(122)の実装領域の上部のみに形成された透光性を有する受光素子封止部(132)と、配線基板(110)の主面(110a)上に形成され、発光素子封止部(131)並びに受光素子封止部(132)それぞれの周囲、及び、発光素子封止部(131)と受光素子封止部(132)との間に設けられた遮光部(133)とを備える。
