Winged deformity of the scapula is deWned as prominence of the medial border of the scapula. Osteochondroma arising from the ventral side of the scapula has been demonstrated to cause the mechanical symptoms of winged deformation. We present a 22-year-old man with winged deformity of the left scapula due to osteochondroma. Complete removal of the tumor relieved the symptoms, and histopathologic examination conWrmed benign osteochondroma. There were no signs of recurrence on radiological images at the last follow-up of 10 months.