Rubber stopper

A rubber stopper configured to be mounted onto a stopper part of a vibration damping device, the stopper part being adapted to limit an amount of deformation of the vibration damping device and having a mounting hole, the rubber stopper comprising:

• a stopper main body to be overlapped on an abutting face of the stopper part;
• and
• at least one mounting leg projecting from the stopper main body to a side of the abutting face of the stopper part, the mounting leg being configured to be inserted into the mounting hole of the stopper part, wherein
• the mounting leg includes a neck to be positioned within the mounting hole, a protrusion to pass through the mounting hole and project to be positioned on a side of a back surface of the stopper part, and a detent positioned between the neck and the protrusion, the detent having an outer peripheral surface enlarged from the protrusion toward the neck and being configured to be detained with the back surface of the stopper part, and
• the detent includes at least one notched part where an outside diameter of the detent is made small, the notched part being provided partially in a circumferential direction of the detent.