Problem to be solved: to provide an optical measuring apparatus capable of accurate measurement even when the mounting position is shifted.A light measuring device 17 is mounted on an object such as a body, etc., and a light emitting part for irradiating light to an object, a plurality of light measuring units 12a to 12C having a light receiving portion receiving light received from a light emitting part and receiving the light reflected by an object, and signals output from a plurality of light measuring units A control section 13 to be processed is provided.The control section 13 measures at least one of the plurality of light measuring sections 12a to 12C from the plurality of light measuring portions 12a to 12C on the basis of the positional deviation detected by the positional deviation detecting portion 13A and the position deviation detecting part 13A for detecting the positional deviation from being mounted on the object and the position deviation detecting part An optical measurement selecting portion 13b for selecting at least one light measuring portion used is provided.Diagram【課題】装着位置がずれても、正確な計測を可能にする光計測装置等を提供する。【解決手段】光計測装置17は、身体等の対象物に装着され、対象物に光を照射する発光部、及び、発光部から照射されて対象物で反射した光を受光する受光部を有する複数の光計測部12a~12cと、複数の光計測部12a~12cから出力される信号を処理する制御部13とを備える。制御部13は、複数の光計測部12a~12cのうちの少なくとも一つについて、対象物に装着されてからの位置ずれを検知する位置ずれ検知部13aと、位置ずれ検知部13aで検知された位置ずれに基づいて、複数の光計測部12a~12cから、計測に用いられる少なくとも一つの光計測部を選択する光計測選択部13bとを有する。【選択図】図1