Detecting device and measuring apparatus

A detecting device, comprising:

• a semiconductor substrate;
• a first light-emitting section provided at the semiconductor substrate, the first light-emitting section being configured to emit first light having a first wavelength band toward a living body;
• a second light-emitting section provided at the semiconductor substrate, the second light-emitting section being configured to emit second light having a second wavelength band toward the living body, the second wavelength band being longer than the first wavelength band;
• a first light-receiving section provided at the semiconductor substrate, the first light-receiving section being configured to receive light from the living body based on the first light;
• a second light-receiving section provided at the semiconductor substrate, the second light-receiving section being configured to receive light from the living body based on the second light;
• and
• an optical filter provided at the first light-receiving section, the optical filter being configured to transmit light having the first wavelength band and to attenuate light having the second wavelength band, wherein
• in view from a perpendicular line direction of the semiconductor substrate,
• the first light-receiving section surrounds the second light-receiving section,
• the first light-emitting section surrounds the first light-receiving section, and
• the second light-emitting section surrounds the first light-emitting section.