In this paper a study on the characteristics and the reduction method for the ground vibration due to traveling tilting car are carried out. The transmitted load which induces the ground vibration is computed through a study on the interaction between tilting car and the line. Then, this load is applied into the numerical model, which is designed considering the diverse ground conditions and tunnels. Through the numerical analysis according to the conditons, the characteristics and the reduction method for the ground vibration by tilting car are studied.