A superconductor filter includes a superconductor receiver filter (2) of a planar transmission line structure including a signal input line (21), a resonator element (22) and a signal output line (23) and configured to select a signal received from an antenna, a superconductor transmitter filter (1) of a planar transmission line structure including a signal input line (11), a resonator element (12) and a signal output line (13) and configured to select a signal transmitted to the antenna, the transmitter filter (1) being arranged non-parallel to the receiver filter (2), and a heat-insulating container housing the superconductor receiver filter (2) and the superconductor transmitter filter (1).