Abstract: For a sensor module that is easily positioned at a position at which biological information can be obtained when attached to an object under detection and a biological information displaying system that includes the sensor module, provided is a biological information displaying system 1 that includes a sensor module 10 that includes a light emitting part 11 including a light emitting element 11a1 and a light emitting element 11a2 arranged at an interval; and a light receiving part 12 including one light receiving element 12-1 sensitive to near-infrared light. The one light receiving element 12-1 is arranged to receive light emitted by the light emitting element 11a1 and the light emitting element 11b1, and the light emitting element 11a1 and the light emitting element 11b1 emit near-infrared light having a same central wavelength ?1.