Abstract: This invention provides highly reliable ignition device with superior ease of mass production, and a method for the manufacture thereof. An ignition device is constructed by taking a heating element 40 comprising a bridge element 25 composed of a heating bridge wire 25c which is heated by the passage of an electric current and heating electrodes 25a and 25b located at both ends thereof, and a flexible insulating sheet 26 which carries this bridge element; then welding this heating element to stem electrodes, formed in the stem, via connection guides which are openings provided in the insulating sheet at the location of the heating electrodes.