This invention concerns a damper used to reduce the running noise of track wheels. It can absorb wheel vibration, reduce oscillation amplitude and reduce the noise radiation of the wheel. The damper has a damping connector and a damping ring which has an open section; the end of the open section has an angled plane; the damping connector has a pipe-shaped object with two locating objects at the both ends; the locating object has a bar which can get into the pipe-shaped object and a wedge-shaped object which matches the angled plane of the end of the open section; inside the pipe-shaped object is a spring which can push out the two locating objects; each locating object has a locating hole which allows a bar to get through from the pipe-shaped object.