HEATER, AND GLOW PLUG PROVIDED WITH SAME

摘要

[Objective] To provide a heater and a glow plug provided with the heater, wherein generation of micro cracks or the like at joining sections of a resistance element and leads is inhibited, even when a large current flows through the resistance element upon a quick rise in the temperature thereof, or the like. [Solution] A heater (1) of the present invention is provided with: a resistance element (3) comprising a heating unit (4); leads (8) joined to the end sections of the resistance element (3); and an insulation base body (9) that covers the resistance element (3) and the leads (8). The leads (8) have the external shape thereof become thinner towards the front tip at the heating-section side thereof, and joining sections of the resistance element (3) and the leads (8) have areas wherein the resistance element (3) is separated from the insulation base body (9) with the leads (8) interposed therebetween, when viewed from a cross section perpendicular to the axial direction of the leads (8).