Abstract: A liquid-cooled cylinder head is provided for an internal-combustion engine having a water space reaching from the cylinder head bottom to a cylinder head ceiling and having a control space located above it. Supporting walls extend in the cooling water space transversely between sections of the cylinder head bottom on the side of the combustion chamber. For reinforcement of the cylinder head housing, a longitudinal rib is provided in the water space within the cylinder head ceiling. In the planes of the supporting walls, rib webs are provided that overlap into sections of the cooling water space that are adjacent the combustion chamber. In the control space, a crossconnection is provided consisting of longitudinally and transversely extending ribs. The resultant cylinder head exhibits a reinforced structure having superior resistance to applied force.