Noise from rotating tire is studied by not only running on a road or drum test but also numerical simulation, however it is not clear to find the cause of noise generating mechanism and take prompt measures. In this research, a vibration deformation is predicted by sound radiation from a rotating tire under constant speed and the noise reduction is carried out by structural modification. First, the contribution of each vibration mode shape is estimated by using model analysis and boundary element analysis and verified by numerical simulation. Next. the proposed method is applied to a rotating tire to predict the vibration deformation at some frequencies of the noise problem. The advantage of this method is as non-contact measurement and to obtain the contribution of each vibration mode shape. Finally, the highest contribution of the vibration mode shape is focused for structural modification to reduce the noise of the rotating tire.