<p>The invention provides an ignition unit for an internal combustion engine in which a circuit case 9A for receiving an ignition control circuit 40 at a low pressure side end portion of an ignition coil 21 having a cylindrical shape. The ignition unit comprises:
a connector 9B for connecting to an outside portion at a side face of said circuit case 9A, and
a noise killer condenser 71 installed in a space of said circuit case 9A formed between said connector 9B and said ignition control circuit 40,
said noise killer condenser 71 is connected electrically to said ignition control circuit 40 at said space.</p>
