Contactless ignition system for internal combustion engine

A contactless ignition system is provided with an ignition charge discharge condenser (10) for charging an induced voltage of a generating coil (1), a first switching element (12), triggered to conduct when an induced voltage of a trigger coil (2) reaches an initial trigger level, for supplying a voltage charged into the ignition charge discharge condenser into an ignition coil (11), and a trigger control condenser (17) for charging induced voltages of the generating coil and the trigger coil, and triggering of the first switching element caused by an induced voltage of the trigger coil is inhibited by a second switching element (23) during a specified discharge time following charging of the trigger control condenser.