Provided is a blood measuring apparatus including: a spectroscope (1) an optical system (2) configured to irradiate a living body with excitation light from a light source (10), and to guide, to the spectroscope (1), Raman scattered light from the living body a control unit (3) configured to adjust an irradiation position at which the living body is irradiated with the excitation light by the optical system (2) and a detector (4) configured to detect a spectrum of the Raman scattered light using light of each wavelength dispersed by the spectroscope (1). A plurality of the spectra detected by the detector (4) are integrated, and numerical value information regarding a substance included in blood of the living body is measured based on an integration result, and the control unit (3) adjusts the irradiation position such that the plurality of spectra are detected at changed positions.
