PROBLEM TO BE SOLVED: To provide: an optical biological information measuring instrument capable of measuring biological information even when the position of a light emitting/receiving part is shifted by body movements without positioning the light emitting/receiving part and a light emitting/receiving unit for measuring biological information.SOLUTION: The optical biological information measuring instrument comprises a light emitting element 11 for emitting light and a light receiving element 12 disposed separately from the light emitting element 11 for receiving the light from the light emitting element 11, and measures the information of a living body interposing between the light emitting element 11 and the light receiving element 12 on the basis of signals obtained from the light receiving element 12. The instrument includes: a liquid crystal shutter 13 disposed on an optical path between the light emitting element 11 and the light receiving element 12, and forming a light shielding surface 13a for shielding the light from the light emitting element 11 and a light transmitting part 13b for transmitting the light and a controller for controlling the position of the light transmitting part 13b to the light emitting element 11 or the light receiving element 12 on the basis of the intensity of the signals obtained from the light receiving element 12.COPYRIGHT: (C)2010,JPO&INPIT【課題】発受光部の位置決めが不要であり、体動によって発受光部が位置ずれした場合であっても、生体情報を測定することができる光学式生体情報測定装置及び生体情報測定用発受光器を提供する。【解決手段】光を照射する発光素子11と、発光素子11に対して離隔配置されており、発光素子11からの光を受光する受光素子12とを備え、発光素子11及び受光素子12間に介在させた生体の情報を受光素子12から得られる信号に基づいて測定する光学式生体情報測定装置に、発光素子11及び受光素子12間の光路上に配されており、発光素子11からの光を遮断する遮光面13a及び該光を透過させる透光部13bを形成する液晶シャッタ13と、受光素子12から得られる信号の強度に基づいて、発光素子11又は受光素子12に対する透光部13bの位置を制御する制御装置とを備える。【選択図】図1
