A cylinder head configured for dividing coolant introduced thereinto to a combustion chamber side and an exhaust manifold side to increase the amount of coolant introduced to the combustion chamber side, improving cooling performance, may include a head water jacket having a combustion chamber coolant inlet, through which coolant is introduced from a cylinder block to a combustion chamber side, and an exhaust coolant inlet, through which the coolant is introduced from the cylinder block to an exhaust manifold side, the combustion chamber coolant inlet and the exhaust coolant inlet being separated from each other such that the coolant introduced through the combustion chamber coolant inlet flows to the combustion chamber side in an expanded state.