PROBLEM TO BE SOLVED: To provide a biological information detector and the like in which the detection accuracy can be improved.SOLUTION: The biological information detector includes: a light-emitting part 14 which emits a first light R1 directed at a detection site O of a test subject and a second light R2 directed in a direction other than a direction of the detection site O a first reflecting part 12 which reflects the second light R2 and directs the second light towards the detection site O a light-receiving part 16 which receives light R1, R2 having biological information, which is the light produced by the first light R1 and the second light R2 being reflected at the detection site O and a second reflecting part 18 which reflects the light R1, R2 (reflected light) having biological information from the detection site and directs the light having biological information towards the light-receiving part 16.COPYRIGHT: (C)2011,JPO&INPIT【課題】 検出精度を向上可能な生体情報検出器等を提供する。【解決手段】 生体情報検出器は、被検査体の被検出部位Oに向かう第1の光R1及び前記被検出部位Oとは異なる方向に向かう第2の光R2を発する発光部14と、前記第2の光R2を反射させて前記被検出部位Oに導く第1の反射部12と、前記第1の光R1及び前記第2の光R2が前記被検出部位Oにて反射された、生体情報を有する光R1’、R2’を受ける受光部16と、前記被検出部位Oからの前記生体情報を有する光R1’、R2(反射光)を反射させて前記受光部16に導く第2の反射部18と、を含む。【選択図】 図1