Cylinder head and engine

A cylinder head comprising:

• a plurality of port wall portions configured to form flow paths for intake and exhaust;
• an outer circumferential wall portion formed in an annular shape disposed at an interval on an outside of the plurality of port wall portions and having a water chamber through which cooling water flows and which is formed at least between the port wall portions and the outer circumferential wall portion;
• and
• a bottom wall portion configured to face a combustion chamber of an engine and to connect ends of the port wall portions and the outer circumferential wall portion,
• wherein the outer circumferential wall portion includes a padding portion of which a thickness is increased toward a side close to the port wall portions so that a distance between the port wall portions and the outer circumferential wall portion is equal to or less than a predetermined distance and of which a surface facing one of the port wall portions is a concave curved surface passing through a concentric circle of the one of the port wall portions in the cross-sectional view.