In the case of steel railway bridges passing through the urban area, many civil complaints are being raised due to such a structure borne noise. A method of attaching a high-efficiency damping panel to a steel plate is proposed as a solution to the structure borne noise, but the behavior according to the exact adhesion rate is not shown. Therefore, in this paper, a basic study for applying a high efficiency damping panel to a steel railway bridges is to measure the mobility according to the adhesion rate of a high efficiency damping panel on a 1m × 1m steel plate.