In an ignition device having high voltage wiring, the ignition device which prevents and/or suppresses the occurrence of serious damage due to an electric shock is provided. In the ignition device which includes: an ignition plug that generates a plasma discharge; a DC/AC conversion device that outputs AC power toward the ignition plug; a DC power supply device which is arranged in a different package from that of the DC/AC conversion device and outputs DC power to the DC/AC conversion device via wiring; and a power circuit breaker that conducts and/or interrupts the output of said DC power supply device, the power circuit breaker interrupts the output of the DC power supply device at least once between ignition operation and ignition operation.