To provide an elastic stopper, which can effectively prevent a fall of a vibration control bush from an inner cylinder and which can be easily inserted into the inner cylinder.

An elastic stopper 20 is previously fixed to a vibration control bush 1, to which an elastic body 4 is fixed between an inner cylinder 2 fixed to a U-shaped bracket 7 at ends thereof and an outer cylinder 3, and interposed between the U-shaped bracket 7 and the outer cylinder 3. An elastic projection part 24 is integrally projected from a bracket side edge part of an insertion hole 22 drilled in the elastic stopper 20. At the time of inserting the inner cylinder, the elastic projection part 24 is fallen to the inner cylinder 2 inserting direction so as to be adhered to the peripheral surface of the inner cylinder 2.