An optical measurement apparatus 2 includes an imaging unit 23 and a partition unit 24. The imaging unit 23 receives rays of light transmitted from exit ends T1 of a first light receiving fiber 56, a second light receiving fiber 57, and a third light receiving fiber 58 of a measurement probe 5 and performs photoelectric conversion in order to generate and output an electric signal. The partition unit 24 optically isolates paths for the rays of light transmitted from the exit ends T1 of the first light receiving fiber 56, the second light receiving fiber 57, and the third light receiving fiber 58 of the measurement probe 5, from one another in a space from an end surface of the measurement probe to a light reception surface T3 of the imaging unit 23.
