The problem addressed by the present invention is to provide: an optical receptacle that can be easily positioned with a photoelectric converter having a light-emitting element and a detection element. In order to solve the problem, an optical receptacle is provided, said optical receptacle being positioned between a light transmission medium and a photoelectric converter having a substrate, a photoelectric conversion element and a detection element, and the purpose of the optical receptacle being to optically couple the photoelectric conversion element and the end surface of the light transmission medium. The optical receptacle comprises a filter, a holding member for holding the filter, and a receptacle body. In the optical receptacle the holding member and the receptacle body are separate bodies, and the filter reflects towards the detection element side, as monitor light, part of the light emitted from the photoelectric conversion element, and transmits the remainder as signal light.