Abstract: A method and apparatus for non-invasively measuring blood sugar levels based on temperature measurement. A non-invasively determined blood sugar level measurement value is corrected on the basis of the blood oxygen saturation value and the blood flow volume, thereby stabilizing measurement data. A measurement portion is provided with a cover with which the measurement portion can be covered and protected when not in use. By controlling the opening and closing of the cover, erroneous measurement can be prevented. The intensity of a detection signal in an optical system is corrected by a circuit.

Abstract: Blood sugar levels are measured non-invasively based on temperature measurement. Non-invasively measured blood sugar level values obtained by a temperature measurement scheme are corrected by blood oxygen saturation and blood flow volume, thereby stabilizing the measurement data.