The purpose of the Disclosed is that it provides light reflected from the skin surface and loss of accuracy due to interfering components is suppressed, the concentration measuring method of the biological components contained in the living body. Microparticles chip embedded in [SOLUTION] skin is irradiated while being continuously modulated polarization direction, linearly polarized light. Surface enhanced Raman scattering of biological components generated by the fine chip is observed. On the basis of the received light signal that has been observed, to calculate the biological component concentration. Received signal satisfies equation 3. [Selection] Figure Figure 1【課題】本発明の目的は、皮膚表面での反射光および妨害成分による精度の低下が抑制された、生体に含まれる生体成分の濃度測定方法を提供することである。【解決手段】皮膚に埋め込まれた微粒子チップに、直線偏光光を、偏光方向を連続的に変調させながら照射する。当該微粒子チップ上で発生した生体成分の表面増強ラマン散乱光が観測される。観測された受光信号に基づいて、生体成分濃度を算出する。受光信号は、等式3を満たす。【選択図】図1
