An inorganic dielectric powder for composite dielectric material that has high filling capability and that in the use as a composite with polymeric material, exhibits high specific inductive capacity; and a composite dielectric material of high specific inductive capacity that can be used as a dielectric layer in electronic parts, especially those such as a printed circuit board, a semiconductor package, a capacitor, a high-frequency antenna and an inorganic EL. There is provided an inorganic dielectric powder for composite dielectric material, especially composite dielectric material composed of a polymeric material and inorganic dielectricpowder, characterized in that the powder is comprised of particles of perovskite type composite oxide composed of barium titanate particles containing accessory ingredient elements in the form of solid solution, the perovskite type composite oxide particles being those of perovskite type composite oxide prepared by carrying out a wet reaction of a titan compound, a barium compound and a compound containing accessory ingredient element and calcining the resultant product. |