A biophotonic measurement device characterized by having: one or a plurality of photoirradiation means； one or a plurality of light detecting means； a mounting means for mounting the photoirradiation means and the light detecting means to a subject； an analysis means for calculating a state of mounting of the photoirradiation means and the light detecting means to the subject on the basis of a detection value measured by the light detecting means； and an output means for outputting the state of mounting using light or a voice, the output means being installed on the mounting means mounted to the subject, the photoirradiation means, or the light detecting means.
