Abstract: In a cylinder head of a multi-cylinder internal combustion engine having bottom-top and side walls defining therebetween a cooling water space and including for each cylinder a number of intake and exhaust passages arranged around a central well for receiving a spark plug or a fuel injector, which all extend through the cooling water space through which cooling water flows generally in a longitudinal direction of the cylinder head, the bottom wall has for each cylinder cooling water supply openings disposed at a side of the cooling space so as to generate, adjacent the bottom wall, a transverse flow, and transverse projections are arranged ahead of each cylinder so as to extend upwardly for lifting the longitudinal cooling water flow above the transverse cooling water flow.