Abstract: This invention has as its object to provide a ceramic heater provided at low cost without being compromised in its performance, with the result that a ceramic heater equivalent to the conventional product in performance characteristics can be manufactured at reduced cost. A ceramic heater comprising a core, an insulation sheet covering the core and a resistance heating element of high-melting metal embedded between the core and insulation sheet, a high-temperature part of the resistance heating element, the operating temperature of which reaches 300° C. or higher, comprises a high-melting metal supplemented with Re or Mo.

Abstract: A ceramic heater which comprises an insulation sheet comprising 88 to 95 weight % of Al2O3 supplemented with, as sintering aids, 3 to 10 weight % of SiO2, 0.4 to 1.0 weight % of MgO and 1.0 to 2.5 weight % of CaO, a core covered with the insulation sheet, a resistance heating element of high-melting metal as interposed between the insulation sheet and core, and an intermediate layer of an alumina ceramic body having a thickness of 5 to 50 &mgr;m, the alumina ceramic body containing 0.05 to 4 weight % of SiO2, 0.01 to 0.5 weight % of MgO and 0.01 to 1.2 weight % of CaO as interposed between at least a part of the resistance heating element and the core.