(Object) To provide an optical receiver and a control method thereof that enable equalization of both the quantum efficiencies and the dark count probabilities of multiple photon detectors.(Solving Means) An optical receiver includes multiple photon detectors, a first equalizing means that equalizes either dark count probabilities or quantum efficiencies of the multiple photon detectors, and a second equalizing means that equalizes the other ones without affecting the equalization by the first equalizing means.