In a rear vehicle-body structure of a vehicle in which a damper support portion supporting an upper end portion of a suspension damper is provided at a rear wheel house, on a vehicle-inside wall face of the rear wheel house are provided a first brace member which interconnects a front portion of the damper support portion and a rear side frame and a second brace member which interconnects a rear portion of the damper support portion and the rear side frame. Accordingly, the rigidity of the damper support portion provided at the rear wheel house can be improved easily and effectively, and this structure can have superiority in its applicability.