<p>To provide a strong input/output coupling while preventing a Q-value from deteriorating. An input/output probe 110 is set on the upper face of a dielectric resonance element 106 so as to serve as a concentric circular arc of the dielectric resonance element 106. Moreover, the protrusion of an input/output-probe support 401 having a diameter equal to or slightly smaller than the diameter of the internal hole of the dielectric resonance element 106 is fitted into the internal hole of the dielectric resonance element 106 and the input/output-probe support 401 and an input/output-probe holder 402 are screwed with each other through the input/output probe 110. Thereby, it is possible to improve the coupling degree between the input/output probe 110 and dielectric resonator 106. Moreover, it is possible to improve the earthquake resistance and filter stability of the input/output probe 110. <IMAGE> <IMAGE></p>
