PURPOSE: To improve a vibration control characteristic by increasing the capacity of liquid chambers without enlarging the dimensions of a vibration control equipment.

CONSTITUTION: In an intermediate cylinder 30 made of a die-cast aluminum alloy, the outer cylinder 1 side corner part of a large diameter part 36 is formed into an acute angle. The axial measure C of a main liquid chamber 64 and the axial measure D of an auxiliary liquid chamber 50 can be thereby made larger compared to an existing vibration isolator in which the outer cylinder side corner part of the large diameter part is formed into R-shape, so that the maximum capacity of the auxiliary liquid chamber 50 and main liquid chamber 64 can be secured. With the enlargement of the axial measure D of the auxiliary liquid chamber 50, the area of a diaphragm corresponding to the auxiliary liquid chamber 50 can be also enlarged, and the durability of the diaphragm can be improved by suppressing the deformation quantity of the diaphragm at the vibration input time.