An optical transceiver includes an optical component (3) whose ground is integrated with a signal ground. The optical transceiver includes a conductor (51) that is electrically connected to the optical component (3), and a sheet-like insulator (52) disposed between the conductor (51) and a housing (1) such that a main surface thereof is positioned along an inner wall of the housing (1), and separating the signal ground and a frame ground on the side of the housing (1) from each other.