The utility model discloses a bedsore cushion which comprises a circular cushion body. A circular arc-shaped concave area is arranged in the middle of the cushion body; the cushion body has a two-layer structure comprising an upper layer and a lower layer; the upper layer is a slow-resilience sponge layer, and the lower layer is a lining plate layer made of plastics; the lining plate layer is evenly provided with a plurality of small holes; and the diameter of the cushion body ranges from 10cm to 15cm. The bedsore cushion is small and exquisite in structure and adopts the circular design; and the circular arc-shaped concave area is arranged in the middle of the bedsore cushion, so that the small joints of a patient can be just fully covered by the bedsore cushion when in use. The slow-resilience sponge layer is adopted as the upper layer, so that the bedsore cushion is good in supporting effect and comfortable to use. The lining plate layer is evenly provided with the plurality of small holes so as to realize the function of air permeability.