The present invention relates to a drum which is made of wood and has a cylindrical shape and is made of a synthetic leather and is pulled by a fastening string. The resonance leather is tightly pulled to facilitate tightening of the fastening string and a sound-To a resonance of the drum.;The upper frame includes a support plate supported on the lower frame, a upper fixed plate supported by the support plate on the support plate, a hydraulic cylinder provided with a cylinder shaft protruding from the center of the support plate on the lower frame, And a hydraulic pressure generating device and a hydraulic pressure regulating valve for supplying and controlling the hydraulic pressure to the hydraulic cylinder. The hydraulic pressure regulating valve is provided with a pressure regulating valve for regulating the pressure of the hydraulic cylinder,
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