This is to provide a photometric apparatus improved in measurement precision by improving the state of light incident to a sensor, which photometric apparatus 1 comprises a photometric sensor 30 into which light which is an object to be measured is incident, a signal processing means for processing a sensor output by the photometric sensor, and optical systems 50, 100, 92, 93 and 150 which introduces external light into the photometric sensor, wherein a columnar fiber rod 100 in which a center axis is provided along a direction perpendicular to a light receiving surface of the photometric sensor is provided at a part of the optical system.