High frequency discharge ignition device

A high frequency discharge ignition device in which high frequency energy supplied from a high frequency energy supply circuit is coupled to a high voltage pulse supplied from an ignition coil and supplied to a spark plug connected to an engine block,

• the high frequency discharge ignition device comprising:
• an output device that includes a coupling circuit supplying the coupled energy to the spark plug;
• a first housing in which the output device is housed;
• and
• a second housing that is connected to the engine block, the second housing and the engine block being formed separately from each other, wherein
• the output device is directly attached to the spark plug,
• the first housing and the second housing are respectively formed from metal,
• the first housing is grounded,
• the first housing is enclosed in the second housing, and
• the first housing is separated from the second housing by a gap such that the first housing is not in electrical contact with the second housing in a portion other than through the engine block.