Glow plug having built-in sensor

摘要

A glow plug (100) includes a heater member (120); three heater power lead wires (170) which extend rearward along an axis (AX) and whose conductors (171) electrically communicate with one and of a heater conductor (121) for supply of power; a sensor portion (140) for detecting the combustion pressure of an internal combustion engine; a sensor connection line (175) connected to the sensor portion (140) and extending rearward along the axis (AX); a housing (120); a sensor-portion-enclosing tube (160); and a grommet (190) formed from an insulating rubber-like elastic material, having insertion holes (190H) through which the heater power lead wires (170) and the sensor connection line (175) are respectively inserted, the grommet liquid-tightly closing an end portion (160k) of the sensor-portion-enclosing tube (160), and liquid-tightly holding the heater power lead wires (170) and the sensor connection line (175).