Abstract: A pre-chamber in the cylinder head of an internal combustion engine with applied ignition, whereby the pre-chamber which includes an opening for the spark plug and at least one opening leading to the main combustion space is constructed as a structural part separate from and mounted in the cylinder head, and whereby the fuel-air mixture is supplied to the pre-chamber by way of an injection nozzle; the pre-chamber is thereby arranged in an opening of the cylinder head which, at least section-wise, becomes wider in the direction to the main combustion space and is fixed in the opening of the cylinder head by fastening means arranged substantially coaxially to the injection nozzle center plane.