large pressing force is applied to the cylinder head gasket 1 the total thicknesses at the inner peripheral side and at the outer peripheral side of the inner cylindrical portion 62 become equal accordingly the pressing forces at the inner peripheral side and at outer peripheral side of the inner cylindrical portion 62 can be equalized thereby optimizing the stress generated on the inner cylindrical portion 62 according to the experimental results in which the cylinder head gasket 1 with the structures in fig1 to 3 has been used an average of amount of distortion at four portions is reduced by 9 incidentally as an example of the plate thicknesses described above the first metal base plate 10 and the intermediate plate 30 are formed of a plate thickness t 1 respectively the second metal base plate 20 is formed of a plate thickness t 2 t 2 1 2 u00d7 t 1 and the bead plate 30 is formed of a plate thickness t 3 t 3 0 6 u00d7 t 1 next a second embodiment of the present invention will be explained as shown in fig6 to 9 the cylinder head gasket 1 a according to the second embodiment of the present invention comprises a third metal base plate 50 laminated at a side opposite to the folded portion 12 in the first metal base plate 10 in addition to the structure of the cylinder head gasket 1 according to the first embodiment the third metal base plate 50 is provided with a second full bead 51 projecting toward the first full bead 31 said both first and second beads facing each other furthermore a fourth half bead 53 and a fifth half.