PROBLEM TO BE SOLVED: To provide an optical brain function measurement apparatus that achieves brain function measurement at an arbitrary position of a human head.SOLUTION: An optical brain function measurement apparatus includes: a light source part 101 for generating infrared light irradiated to a human head； a detection part 104 for detecting the infrared light that is diffused and reflected in the human head, and emitted from one or more positions of the human head； and an optical system 103 for guiding the infrared light emitted from the light source part to the human head, and controlling the infrared light irradiation position on the human head surface. At least one of the light source part and the detection part is of non-contact type that does not contact the human body, and the one or more positions of the human head from which the infrared light detected by the detection part is emitted include a position at least different from the irradiation position of the light controlled by the optical system.【課題】人体頭部の任意の位置の脳機能計測を実現する光脳機能計測装置を提供する。【解決手段】人体頭部に照射する赤外光を生成する光源部１０１と、人体頭部内で拡散反射し、人体頭部の１つ以上の位置から出射した赤外光を検出する検出部１０４と、光源部から出射した赤外光を人体頭部に導くとともに、赤外光の人体頭部表面上の照射位置を制御する光学系１０３を備え、光源部、および検出部の少なくとも一方が前記人体と接触しない非接触型であり、検出部が検出する赤外光が出射する前記人体頭部の１つ以上の位置は、光学系が制御する光の照射位置と少なくとも異なる位置を含む。【選択図】図１
