PROBLEM TO BE SOLVED: To reduce restrictions when being installed in a living body and to facilitate the miniaturization of an instrument whole body.SOLUTION: This living body component analysis instrument 1 which is disposed in a living body and analyzes the components in the living body, is provided with: a detection container 25 having molecule permeable films 30a and 30b, which allow the permeation of molecules contained in the components, to constitute a part of an outer wall a light path A constituted to include mirrors 33a and 33b inside the detection container 25 and guiding a light from a window part 31 to a window part 32 a light source 26 for entering a light from the window part 31 in the direction along the light path A a light detector 27 for detecting the light emitted from the window 32 toward the outside of the detection container 25 a polarizer 28 provided between the light source 26 and the window part 31 and transmitting the light having a first polarization face and an analyzer 29 provided between the window part 32 and the light detector 27 and transmitting the light having a second polarization face.COPYRIGHT: (C)2008,JPO&INPIT【課題】生体内に設置する際の制約を少なくし、且つ、装置全体の小型化を容易にすること。【解決手段】この生体内成分分析装置1は、生体内に配置されて生体内の成分を分析する生体内成分分析装置であって、成分に含有される分子を透過させる分子透過膜30a,30bが、外壁の一部を構成するように設けられた検出容器25と、検出容器25の内部においてミラー33a,33bを含んで構成され、窓部31から窓部32に向けて光を導く光路Aと、窓部31から光路Aに沿った方向に光を入射する光源26と、窓部32から検出容器25の外部に向けて出射した光を検出する光検出器27と、光源26と窓部31との間に設けられ、第1の偏波面を有する光を透過させる偏光子28と、窓部32と光検出器27との間に設けられ、第2の偏波面を有する光を透過させる検光子29とを備える。【選択図】 図4
