| 摘要 |
[Problem] There are provided a heater having high reliability and high durability in which generation of microcracks due to stress concentration derived from local expansion of a bent portion of a lead is suppressed even when a large electric current flows into the bent portion at the time of sharply elevating a temperature of the heater, and a glow plug provided with the heater. [Solution] A heater (1) of the invention includes an insulating base body (2); a resistor (3) embedded in the insulating base body (2); and a lead (4) embedded in the insulating base body (2) and including one end connected to the resistor (3), and a terminal portion (41) at another end thereof which is exposed from a surface of the insulating base body (2). The lead (4) further includes a bent portion (A) bent toward the terminal portion (41), and an aspect ratio in at least one cross section of the bent portion (A) is larger than an aspect ratio in another cross section of the bent portion (A), the another cross section being positioned closer to the terminal portion (41) than the at least one cross section of the bent portion (A). |
