Abstract: A first bushing rubber and a first collar are integrally fixed to an outer periphery of a left end of an inner tube which supports a spherical portion of a support shaft for rotation through a bearing. A second bushing rubber and a second collar are integrally fixed to an inner periphery of a right end of an outer tube which is disposed outside the inner tube. A liquid chamber, containing a liquid encapsulated therein, is defined between the first and second bushing rubbers by axially placing the outer tube over the outside of the inner tube, fixing the outer tube to the first collar by caulking, and fixing the second collar to the inner tube by press-fitting. Thus, it is possible to easily determine the spring characteristics of the first and second bushing rubbers and the sectional shape of the liquid chamber.