Isolated fracture-dislocation of the radial head without fracture of the ulna is extremely rare. A 15-year-old girl with such an injury came to our hospital on May 13, 1988, having fallen on her hand with the elbow outstreched. Examination revealed marked tenderness over the head of the radius, and pain on all motion. X-rays revealed an anterior dislocation-fracture of the radial head without fracture of the ulna. Closed reduction under general anesthsia was achieved. 12 months later, she had a little loss of rotation, however, had no functional complaint.