PROBLEM TO BE SOLVED: To irradiate a living body region with sufficient sensor light intensity, to prevent the saturation of a light receiving element, and to reduce the size of a configuration.SOLUTION: In this bioinformation detection device, a light emission plate 1 and a light reception plate 2 are disposed horizontally side by side such that one side face and one side face thereof contact with each other and that the upper faces 1b, 2b form the same plane, and sensor light 5 of a light emitting element 3 is made to be incident on the light emission plate 1 from a first side end face 1a and is face-emitted from the upper face 1b. When having brought a living body region 7 into contact with the upper faces 1b, 2b of the light emission plate 1 and the light reception plate 2, a scattered light component 6a having been incident on the light reception plate 2 of scattered light 6 generated in the living body region 7 by the irradiation of the face-emitted sensor light 5a is made to be emitted from an emission face 2b of the light reception plate 2, and is made to be received by a light receiving element 4. A light reception signal of the scattered light component 6a received by the light receiving element 4 is inputted to a signal processing unit 200, and a change of a waveform of the plethysmogram of the living body region 7 is detected to extract a characteristic of the living body region 7.COPYRIGHT: (C)2013,JPO&INPIT【課題】生体部位に対し十分なセンサ光量を照射できるようにすると共に、受光素子の飽和を防止し、さらに構成の小型化を可能にする。【解決手段】発光板1及び受光板2を、その一方の側面同士が接触しかつ上面1b,2bが同一面を形成するように水平方向に並べて配置し、発光素子3のセンサ光5を発光板1に対しその第1の側端面1aから入射して上面1bから面発光させる。そして、上記発光板1及び受光板2の上面1b,2bに生体部位7を接触させたとき、上記面発光されたセンサ光5aの照射により当該生体部位7において発生した散乱光6のうち受光板2に入射した散乱光成分6aを受光板2の出射面2bから出射させて受光素子4で受光させ、この受光素子4で受光された散乱光成分6aの受光信号を信号処理ユニット200に入力し、生体部位7の容積脈波の波形の変化を検出して生体部位7の特徴を抽出する。【選択図】図1
