Ignition device

An ignition device, comprising:

• an igniter that accommodates an ignition charge to be ignited by energization;
• and
• a holder that is integrated with the igniter by fitting the igniter into the holder, wherein the igniter includes:
• a tube body containing the ignition charge inside and including an opening,
• a header that occludes the opening and seals the ignition charge inside the tube body, and
• a pair of terminal pins provided on the header,
• an end portion of the tube body forming the opening and protruding with respect to the header, and
• the holder includes:
• a bore including an insertion port that is formed inside and into which the igniter is inserted and a press-fitting portion into which the tube body is press-fitted via the insertion port, the igniter being fitted into and fixed to the bore by press-fitting the tube body into the press-fitting portion via the insertion port, and
• an annular groove that is formed in a part of an inner wall of the bore and into which an end portion of the tube body is fitted, and
• a labyrinth structure formed by at least the end portion of the tube body fitted into the annular groove and the annular groove.