It is an object of the present invention to provide a technique for measuring the lipid concentration in blood more accurately. When calculating the scattering coefficient, it is determined whether or not the detection light is transmitted through the blood, and the problem is solved by calculating the scattering coefficient of the light determined to be transmitted through the blood. Specifically, a non-invasive living body lipid measuring device that measures lipids in blood in a living body, and an irradiation unit that emits light at a predetermined light intensity from outside the living body to the living body, and from the irradiation unit A light intensity detector that detects the intensity of light emitted from the living body after being scattered in the living body, and light scattering in the living body based on the light intensity detected by the light intensity detecting unit A scattering coefficient calculation unit that calculates a coefficient; and a lipid concentration calculation unit that calculates a lipid concentration based on the calculated scattering coefficient, wherein the scattering coefficient calculation unit is detected by the light intensity detection unit. A non-invasive biolipid measuring instrument that determines whether light intensity is transmitted through blood in the living body and calculates a scattering coefficient of light determined to be transmitted through blood in the living body. is there.
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