With the increase in the number of people playing sports such as baseball, tennis, and golf the incidece of Osteochondritis dissecans of the elbow has also increased recently. We report two cases of this disease who had large defects of the capitulum. The size of articular surface defect was 1. 5x1.2cm and 1.7x1.3cm after removing the free bodies. If we simply remove the free bodies,the elbow joint will degenerate or the patient grown up. We therefore tramsplant an osteochondral homograft using the iliac crest growth plate to the defect. The clinical result was excellent.