| 摘要 |
PROBLEM TO BE SOLVED: To prevent a heating element from being broken by a heat spot. SOLUTION: This heater 10 comprises an envelope 12 having inside a heating element housing space 12a of nonoxidizing atmosphere and a gas tight sealing portion 12b at an end portion thereof; the heating element 14 made of carbon fiber body, having a connecting portion 14a at an end portion thereof, and housed in the heating element housing space 12a; a feeding member 16 with one end portion connected to the connecting portion 14a of the heating element 14, and with the other end protruding outside the envelop 12; and a conductive member 18 provided at an end portion of the heating element 14 independently from the feeding member 16. One end portion of the conducive member 18 is placed at a position B which is the same as a leading end b at heat generating side of the feeding member 16 in contact with the connecting portion 14a of the heating element 14, or at a position C entering a heat generation side H, and the other end portion is placed in the connecting portion 14a.
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