There is provided a cylinder head of an engine. The cylinder head includes cylindrical parts for lash adjustors into which the lash adjustors are inserted and cylindrical parts for fuel injection valves into which the fuel injection valves are inserted. An outer periphery of each of the cylindrical parts for the lash adjustors is connected to a sidewall of the cylinder head, which is disposed above intake ports communicating with a combustion chamber and each of the cylindrical parts for the fuel injection valves is disposed below the cylindrical parts for the lash adjustors. A lower end portion of each of the cylindrical parts for the lash adjustors is connected to an upper part of each of the cylindrical parts for the fuel injection valves by a reinforcement part.