In a bearing metal fitted to a journal bearing portion where a center of a bearing metal fitting hole is deviated from a reference straight line in a direction orthogonal to the reference straight line at a time of mounting a cylinder head, a thickness, in a direction parallel to a direction in which the center of the bearing metal fitting hole is deviated, of one of an upper metal and a lower metal, which is positioned in the same direction as the direction in which the center of the bearing metal fitting hole is deviated, is increased by an amount by which the center of the bearing metal fitting hole is deviated from the reference straight line, and a thickness, in the direction parallel to the direction in which the center of the bearing metal fitting hole is deviated, of one of the upper metal and the lower metal, which is positioned in a direction opposite to the direction in which the center of the bearing metal fitting hole is deviated, is reduced by the amount by which the center of the bearing metal fitting hole is deviated from the reference straight line.