A superconducting filter device is disclosed that includes a dielectric
base substrate; a patch-type resonator pattern formed of a
superconducting material on the base substrate; and a feeder extending in
the vicinity of the resonator pattern. The feeder includes a transmission
line part for signal inputting or signal outputting, the transmission
line part extending toward the resonator pattern; a facing part bent from
the transmission line part to face the resonator pattern; and an end part
bent from the facing part in a direction away from the resonator pattern.