SENSOR FOR MEASURING BIOLOGICAL COMPONENT

A biological component measuring sensor (10) comprising a plurality of light-receiving regions (21, 22) provided in a light-receiving element (20) for receiving light from an organism, and a plurality of waveguides (15, 16) provided in correspondence with the plurality of light-receiving regions (21, 22), each including an in-let side opening through which the light enters and an out-let side opening from which the light exits, and introducing the light to the plurality of light-receiving regions (21, 22), respectively. The plurality of waveguides (15, 16) are provided in a waveguide formation member (14) formed integrally, and the opening area of the in-let side opening of each of the waveguides (15, 16) is larger than the opening area of the out-let side opening. Consequently, the sensor can receive light from an organism more efficiently.