Rear subframe structure

This rear subframe structure is provided with a rear subframe comprising the following members linked together: a front cross member, a rear cross member, and a left-right pair of upper side members and left-right pair of lower side members which extend in the longitudinal direction of the vehicle, wherein vehicle mounting units are provided on both ends of the front cross member in the vehicle width direction and on the rear ends of the upper side members. The rear subframe is further provided with a columnar unit which is formed between an upper side member and a lower side member and which extends in the vehicle width direction; a first arm support unit which supports a first arm and is provided on the front surface of the columnar unit positioned above the lower side member; a second arm support unit which supports a second arm and is provided on the rear surface of the columnar unit positioned below the first support arm and to the side of the lower side member; and an arm support bracket which is erected between the lower side member and the rear surface of the columnar unit and supports the second arm support unit from the rear.