As for living body measurement equipment 1, when the disposal tool Interpolation which is provided inside interposition section 21 the endoscope 11 which possesses channel 26 and the disposal tool Interpolation the pump light from of the illuminant 64 which light of 62 which transmits the water inside channel 26 and the specified wavelength area radiation is done, the disposal tool Interpolation the water is transmitted the optical system 72 and the like which is led inside the water which is transmitted inside channel 26 and, from pump 62, as the light which passed by inside the water it returns reflecting at the time of target ones it possesses with the spectroscope 65 which detects the reflected light which passed by inside the water.生体測定装置1は、挿入部21の内部に設けられた処置具挿通チャンネル26を有する内視鏡11と、処置具挿通チャンネル26内に水を送出するポンプ62と、所定の波長域の光を出射する光源64からの光を、処置具挿通チャンネル26内に送出された水内に導く光学系72等と、ポンプ62から水が送出されているときに、水内を通った光が対象物に当たって反射して戻ると共に水内を通った戻り光を検出する分光器65とを有する。
