<p>A damping device (10) comprises laminated rubbers (13) interposed at four corners between a support having the floor plate of a construction machine and a movable body having the seat body of operator, and a pair of dampers (14, 15) having one end fixed to the lower supporting plate (11) on the support side and the other end fixed to the upper supporting plate on the movable body side.The laminated rubbers (13) are arranged while spaced apart in the front/back direction and the right/left direction with reference to the seating direction of the operator. One damper (14) is arranged along the front/back direction at a position corresponding to the center in the right/left direction between the laminated rubbers (13) arranged in the right/left direction, and the other damper (15) is arranged along the right/left direction on the front side of the center in the front/back direction between the laminated rubbers (13) arranged in the front/back direction.</p>
