Rear subframe structure

A rear subframe structure, comprising:

• a rear subframe configured such that a front cross member extending in a vehicle width direction, a rear cross member extending in the vehicle width direction on a rear side of the front cross member, a left upper side member and a right upper side member extending in a vehicle front-rear direction, and a left lower side member and a right lower side member extending in the vehicle front-rear direction are connected in a substantially grid pattern in a plan view of a vehicle;
• a vehicle-body mounting portion formed on each of both ends of the front cross member in the vehicle width direction, and on each of rear ends of the upper side members;
• and
• on each of the left and right sides of the rear subframe structure, respectively:
• a pillar portion formed into a vertical wall shape between the upper side member and the lower side member, and extending in the vehicle width direction;
• a first-arm support portion formed on a front surface of the pillar portion located on an upper side of the lower side member to support a first arm;
• a second-arm support portion formed on a rear surface of the pillar portion located on a lower side of the first-arm support portion and on a lateral side of the lower side member to support a second arm;
• and
• an arm support bracket mounted between the lower side member and the rear surface of the pillar portion to support the second-arm support portion from a rear side.