To obtain a ferrite material showing high initial magnetic permeability over a large band width.

In the MnZn ferrite which comprises 0-0.005 pts.wt. SiO2, 0.05-0.2 pts.wt. CaO, 0.05-0.5 pts.wt. MoO3 and 0.005-0.1 pts.wt. Bi2O3 as additives per 100 pts.wt. MnZn ferrite of a main component, a resultant fired body has a deposition phase containing MoO3 and CaO on the surface of the fired body, 30 to 100 m average crystal particle diameter, 20 to 100 cm specific resistance of the fired body, magnetic permeability of 12,000 in 1 kHz and magnetic permeability of 12,500 in 150 kHz.