PROBLEM TO BE SOLVED: To provide a method for noninvasive human body component using a laser beam, on the basis of a floating definitive method.SOLUTION: When obtaining an optimum measurement value M of each person and a floating reference value C to be obtained on the basis of the floating definitive method, a laser interference technique is used, each beat frequency suited to the optical distance of the optimum measurement value of each person and the optical distance of the floating reference value is selected, a specific luminous flux is selectively measured from scattered light on the basis of the beat frequency, and the human body components for a specific part of living tissue is detected by the measured measurement value and a reference value.【課題】浮動基準法に基づいて、レーザー光を用いて無侵襲にて人体成分を測定する方法を提供する。【解決手段】浮動基準法に基づいて求められる各人の最適測定値Mと浮動基準値Cを求めるにあたり、レーザー干渉技術を用い、各人の最適測定値の光学距離と浮動基準値の光学距離を見合う各ビート周波数を選択し、それに基づき散乱光の中から特定の光束を選択的に測定し、測定される測定値と基準値とにより生物組織の特定部位に対する人体成分の検出を実現する。【選択図】図１
