A liquid chamber is arranged with a first support member 1, a second support member 2 and an elastic member 3, an inside of the liquid chamber is divided to a main liquid chamber 11 and an auxiliary liquid chamber 12 by a partition member 10 and both chambers are communicated with a damping orifice passage 14 and an idle orifice passage 15. On an inner face of a conical portion 4 of the elastic member 3, thin wall portions 7 are provided by forming recess 6 at axially symmetrical position so as to yield a minimum value for a dynamic spring characteristic against a vibration input in a designated medium frequency by a membrane resonance. A non-circular medium to high frequency device 20 projecting into the main liquid chamber 11 is provided to the first support member 1 so as to resonate by liquid column against a vibration input in a designated high frequency. Utilizing an elastic orifice member 31 the idle orifice passage 15 is formed and a part thereof is made to be an integrated elastic membrane portion 16 so as to have a non-linear spring characteristic that changes spring constant thereof by magnitude of vibration input. It becomes possible to absorb the vibration by elastic deformation through increasing of an inner pressure of liquid and to prevent large deformation by a large deformation control portion when a large vibration is inputted.