| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heating body, a picture heating device and a picture forming device with high reliability, having the structure not broken by the heating stress at the part where papers are not running through, and not broken by the dielectric breakdown between a base plate and an electrode even if a contact point receives mechanical stress. SOLUTION: The heating body comprises an insulation layer 19 on a metallic base material 11 and a heating resistor 12 on the insulation layer 19. The dielectric strength between a contact point part 15 supplying electric power to the heating resistor 12 and the base material 11 is made bigger than that between the heating resistor 12 and the base material 11.
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