PURPOSE: To prevent interference and dispersion of tuning by ensuring liquid pressure absorption on the basis of the deflection of a thin diaphragm to an air chamber against high frequency vibration while ensuring sufficient liquid flow against low frequency vibration and preventing the thin diaphragm from the breakage caused by a stopper member while further effectively reducing dynamic spring constant in a region of practical frequency by a bevel member.

CONSTITUTION: Ends of inner and outer tubular bodies 1, 2 are connected to each other through main elastic bodies 3, 3 and intermediate parts are connected to each other through auxiliary elastic bodies 4. Two liquid chambers 5,5 are defined in the auxiliary elastic body in the direction of vibration input to communicate to each other through an orifice 6. A stopper member 8 projecting in the direction of vibration input is provided. An air chamber 7 spaced from a thin diaphragm 4c is provided only in a portion of a position in the direction of tube shaft defining the liquid chamber to communicate to the atmosphere. The thin diaphragm is composed of a portion of the auxiliary elastic body. Also, a bevel member 9 expanded in the direction of tubular axis is provided on the tip of the stopper member to form a gap 5a between the projecting end and the wall surface defining the liquid chamber.