CERAMIC HEATER

PROBLEM TO BE SOLVED: To enhance durability, by preventing movement of a glass ingredient ionized at heat-generating parts, in a ceramic heater. SOLUTION: After a second and a lowest ceramic insulation layer 21 are printed with resistive heat-generator patterns 22, 23, respectively, and a third and a fourth ceramic insulation layer 21 are printed with strip-like conductor solid patterns 24, 25, also serving as power-supply lead parts, the respective ceramic insulation layers 21 are laid one on another, thermally pressure-bonded together, and baked. The resistive heat-generator patterns 22, 23 on both sides are connected in series with each other by via-conductors 28, 29 for layer-to- layer connection while the conductor solid patterns 24, 25 are each connected in series with one end of the respective resistive heat-generator patterns 22, 23. In this structure, because the conductor solid patterns 24, 25 confront each other inside of the resistive heat-generator patterns 22, 23 substantially of the same potential as these, electrical fields generated near the resistive heat- generator patterns 22, 23 become small, and a glass ingredient ionized at heat- generating parts is prevented from moving.