To provide a device and a method each for measuring the levels of individual lipids in a lipoprotein by non-invasive lipid measurement. The device is equipped with: an irradiation unit which can emit irradiation light having a first wavelength and irradiation light having a second wavelength at predetermined light intensities toward the inside of a living body from the outside of the living body； a light intensity detection unit which is arranged at a predetermined distance apart from a position at which light is emitted from the irradiation unit or is arranged adjacent to the position, and can detect the intensities of first light and second light both emitted from the living body for the purpose of measuring the irradiation-detection-distance-dependent attenuation of light intensity of each of the emitted irradiation light having the first wavelength and the emitted irradiation light having the second wavelength； a scattering coefficient calculation unit which can calculate a first scattering coefficient and a second scattering coefficient in the living body respectively on the basis of the intensities of the first light and the second light both detected by the light intensity detection unit； and a lipid level calculation unit which can calculate the amount of change in each of the levels of a second group of lipids in the blood on the basis of the amount of change in the second scattering coefficient and can also calculate the amount of change in each of the levels of a first group of lipids on the basis of the amount of change in the first scattering coefficient.本發明所要解決的問題在於提供一種藉由非侵入式脂質測量來測定脂蛋白中的脂質的各自的濃度之裝置及其方法。 為了解決此問題，本發明的血脂濃度測量裝置，具有：照射部，其自生物體外方朝向生物體內以規定的光強度來照射第一波長的照射光和第二波長的照射光；光強度檢出部，其為了測量所照射的第一波長和第二波長的照射光的光強度對應於照射檢出間距離之衰減而被配置成與藉由照射部所照射的光的照射位置相距規定間隔、或連續地配置，並檢出自生物體放出的第一光強度和第二光強度；散射係數算出部，其基於藉由光強度檢出部所檢出的第一光強度和第二光強度來個別地算出在生物體內的第一散射係數和第二散射係數；及，脂質濃度算出部，其基於第二散射係數的變化量來算出血液內的第二脂質群的濃度的變化量，並基於第一散射係數的變化量來算出第一脂質群的濃度的變化量。
