PROBLEM TO BE SOLVED: To reduce the effect of directly reflected light on a contact-surface side of a contact member.SOLUTION: A biological information detector includes: a light-emitting part 14 a light-receiving part 16 a reflecting part 18 a protecting part 19 subjected to protect the light-emitting part 14, the protecting part having a contact member 19-2 provided with a contact surface in contact with the detection site, and the contact member being formed from a material that is transparent with respect to a wavelength of the light emitted by the light-emitting part 14 and a substrate 11. Light emitted from the light-emitting part 14 is prevented from reflecting once on a contact-surface side of the contact member 19-2 of the protecting part 19 and being incident on a light-receiving region of the light-receiving part 16.COPYRIGHT: (C)2011,JPO&INPIT【課題】 接触部材の接触面側での直接反射光による影響を低減すること。【解決手段】 発光部14と、受光部16と、反射部18と、被検査体と接触する接触面を備える接触部材19-2を有すると共に、接触部材が発光部14が発する光の波長に対して透明な材料で構成され、かつ発光部14を保護する保護部19と、基板11と、を含み、発光部14から発せられた光が、保護部19における接触部材19-2の接触面側で一回反射して受光部16の受光領域に入射することが抑制される。【選択図】 図6
