To provide a vibration isolation support that excels in the durability and intends to stabilize the displacement regulation function for an outer cylinder 11 and an inner cylinder 12 by a stopper 2.

A mounting 1 connects the outer cylinder 11 with the inner cylinder 12 that is arranged as displacable to an inner circumference flexibly by an elastic body 13, and the clearance 14 is formed on an opposite side to the load action direction of the supported body between the outer cylinder 11 and the inner cylinder 12. A radial direction stopper 22 of the stopper 2 made of the rubber-like elastic material covered and fixed to the inner cylinder 12 at a setting part 21 is inserted in the clearance 14, and the inner cylinder 12 and the radial direction stopper 22 are fitted mutually toward the circumference of the inner cylinder 12. Consequently, the radial direction stopper 22 does not make the inside of the clearance 14 eccentrically locate to the circumference direction which succeeds the radial relative displacement regulating function stably. Also the setting part 21 does not receive the radial compression and the buckling, until the inner face of the clearance 14 on the side of the outer cylinder 11 and the opposed face of the radial stopper 22 contact each other.