1. An optical measurement apparatus for a living body comprising a light source for generating a light to be irradiated onto an object to be examined, a light measurement means that detects a light transmitted inside the object and generates hemoglobin signals corresponding to hemoglobin changes in the subject, an assessing means that analyzes feature amounts of the hemoglobin signals and assesses a disease of the object from the analyzed feature amount, and a display means for displaying disease information of the object.