A suspension system for a vehicle includes a housing; a damper part disposed within the housing and to extend through the housing; a transfer part surrounding the damper part and coupled to the damper part; a damper mount coupled to the transfer part, and disposed between an inner wall of the housing and the transfer part and configured to absorb vibration of the transfer part; a fixing part stacked over the damper mount and fixed to the inner wall of the housing; and an anti-leakage part coupled to the fixing part and configured to prevent an air leakage between the fixing part and the damper mount.