As it is arranged in the point of frame 12a because it locks in applied part 51 of the holder 50 which is installed in the suffering inspection body and frame 12a, the luminous section 2 which light radiation is done and, one end is connected luminous section 2, the other end has with the transmission line 30 which control section 21 is connected, by the fact that it is locked to holder 50, the probe 12 for sending light which irradiates light to the suffering inspection body, the point of frame 12a has the salient 12b of the cylinder shape of the plural books, luminous section 2 is plural luminous elements 2,Luminous element 2 is arranged respectively in the point of each salient 12b, transmission line 30 is transmission line 30of a the plural books, transmission line 30a features that it is respectively arranged inside each salient 12b.被検体に装着されるホルダ50の装着部51に固定するための筐体12aと、筐体12aの先端部に配置され、光を出射する発光部2と、一端部が発光部2と接続されるとともに、他端部が制御部21と接続される伝送路30とを備え、ホルダ50に固定されることで、被検体に光を照射する送光用プローブ12であって、筐体12aの先端部は、複数本の棒状の突出部12bを有し、発光部2は複数個の発光素子2であり、発光素子2は各突出部12bの先端部にそれぞれ配置されており、伝送路30は複数本の伝送路30aであり、伝送路30aは各突出部12bの内部にそれぞれ配置されていることを特徴とする。
