A living body information measurement device includes an illuminator that irradiates a living body with illumination light an imaging unit that images the living body and a computation unit that computes living body information on the basis of a difference between pixel data in an irradiation area being an area of the living body irradiated with the illumination light and pixel data in a non-irradiation area being an area of the living body not irradiated with the illumination light, included in pixel data associated with each position in an image generated by the imaging of the imaging unit.
