<；P>；PROBLEM TO BE SOLVED: To provide an optical measuring apparatus for a living body for estimating a measurement noise, predicted after and before the measurement and easily displaying it in measurement of a subject in order to measure the subject in a state where the measurement noise is lowered to a required level by performing improvement of setting of an optical fiber or the like by an operator before the measurement. <；P>；SOLUTION: A feature of estimating the measurement noise, which is predicted after and before the measurement from the quantity of received light obtained before the measurement in the measurement of the subject by using information on the relationship between the quantity of the received light and the measurement noise which is drawn from the measurement result of the previous measurement using a phantom is provided in the optical measuring apparatus for a living body. <；P>；COPYRIGHT: (C)2010,JPO&INPIT
