PURPOSE: To set or adjust a coupling between adjacent resonators by forming an external conductor part elimination part at a part of the periphery of a conductor for coupling in all or prescribed dielectric resonators among the plural dielectric resonators.

CONSTITUTION: The dielectric resonators Ra-Rc for which internal conductors 3a-3c are formed inside dielectric blocks and the conductors for the coupling for forming capacitance among the internal conductors are formed along with external conductors 6a-6c on side faces are integrated by jointing the side faces and the adjacent dielectric resonators are connected. In this case, by forming the external conductor part elimination part 31ab on the side face of the dielectric resonator, the capacitance between the internal conductors 3a and 3b and the external conductors 6a and 6b is reduced, the apparent capacitance between the internal conductors through the conductor for the coupling is increased and an electric field coupling between the internal conductors 3a and 3b is increased. Also, by forming the external conductor part elimination part 32c, the capacitance between the internal conductors 3b and 3c and the external conductors 6b and 6c is reduced and the electric field coupling between the internal conductors 3b and 3c is increased.