A component measurement device for measuring a component of interest in blood based on an optical property of a mixture containing a pigmentary component colored by a color reaction between the component of interest in the blood and a reagent, the component measurement device including: an absorbance obtaining unit configured to obtain a measured value of absorbance of the mixture at a measuring wavelength; and an absorbance correction unit configured to correct the measured value of absorbance of the mixture at the measuring wavelength based on information on scattered light and a ratio between reduced hemoglobin and oxygenated hemoglobin in erythrocytes.