To provide a vehicle body structure in which even when a reinforcing member joined to a lateral member and a longitudinal member supports a vehicle body-mounted member which is a vibration generation source, the high joining strength is obtained.

The vehicle body structure includes: a lateral member (upper member 110) extending in a vehicle width direction near the upper side of a vehicle body-mounted member (radiator 102) which is a vibration generation source; a longitudinal member (side brace 120a) extending in a vehicle height direction near the side of the vehicle body-mounted member; and a reinforcing member 130 put across the lateral member and the longitudinal member and joined thereto, the reinforcing member supporting the vehicle body-mounted member. In the reinforcing member, the joined surface 132 to the lateral member and the joined surface to the longitudinal member 134 are longitudinal surfaces almost parallel to the vehicle height direction.