PURPOSE: To correct a disadvantage observed on various groups of elastic components of prior art by utilizing a latest development of a hydraulic sensor and an acceleration sensor general in a vehicle manufacturing field.

CONSTITUTION: An operation type elastic connection device for conducting antivibration filtering having two different rigidities in a vehicle suspension system comprises a piezo-rigid tubular chamber embedded in an elastomer compound block 10 that is elastically connected between fastening reinforcing materials 1 and 7, that is, a piezo-rigid tubular chamber 11 for suppressing a transverse deformability by a ratio at least three times or above by a hydraulic action fed into a tubular assembly having an adapter 12 deformable in a no pressure state. This is utilized in a field of a vehicle suspension.