PROBLEM TO BE SOLVED: To accurately detect weak optical components in a biosensor including a light-emitting element 24 and a light-receiving element 26.SOLUTION: The biosensor includes: the light-emitting element 24 which is formed on a mounting surface side that is one surface of a substrate 22 and emits light toward a living body on the opposite side of the substrate 22 the light-receiving element 26 which is formed away from the light-emitting element 24 on the mounting surface of the substrate 22, receives light from the living body and outputs signals corresponding to the received light a first light guide member 25 which has light transmission property and is bonded to the substrate 22 so as to cover the light-emitting element 24 and a second light guide member 27 which has light transmission property and is provided away from the first light guide member 25 so as to cover the light-receiving element 26.COPYRIGHT: (C)2013,JPO&INPIT【課題】発光素子24と受光素子26とを備える生体センサーにおいて微弱な光成分を精度良く検出する。【解決手段】基板22の一方の面である装着面側に形成され、基板22とは反対側の生体に向けて光を照射する発光素子24と、基板22の装着面において発光素子24と離間して形成され、生体からの光を受光して、当該受光に応じた信号を出力する受光素子26と、光透過性を有し、発光素子24を覆うように基板22に接着される第1導光部材25と、光透過性を有し、受光素子26を覆うように、第1導光部材25とは離間して設けられた第2導光部材27とを備える。【選択図】図5
