PURPOSE: To improve the reproducibility of cores for a dielectric resonator, to improve a yield and to reduce a manufacturing cost by omitting the rearrangement of compacts in a baking process when lots of the cores for a dielectric resonator are manufactured and reducing the dispersion in the accuracy of size between the cores.

CONSTITUTION: In the case of the manufacture of a coaxial dielectric resonator having a coaxial dielectric resonator core 7 in which a hollow part 6 is formed in the axial direction of a dielectric ceramic formed as a pyramid, after a block A1 having a shape in which plural cores 7 are integrated is manufactured, the respective blocks A1 are separated to manufacture the plural cores 7. As the block A1, the shape in which respective axes (axis of hollow part 6) of the plural cores 7 are in parallel with each other and the cores are formed as image layer and integrated is used. Furthermore, as the block A1, the plural hollow parts 6 are arranged and formed as a matrix in which the axial direction and the plate face direction are set at a right angle.