To the present invention has an upper portion piston 30 in that, when stretched to a lower portion of the cylindrical body 10 is provided with a bottom valve 20 is provided so as to generate a damping force, the cylindrical body 10 of the shock absorber Mr Vehicle in the automobile shock for eopsyo Mr piston valve means (100) is installed, the piston valve means 100 includes a check valve (120 to control the damping force to the upper and lower parts of the piston valve 110 is provided in the piston 30 ) and is provided with a disc structure 130, depending on the speed of the piston by different generating a damping force of the compression and stretching to the side so as to improve the ride comfort.
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