1. A case, believed to be the fifth on record, of supracondylar fracture with rupture of the brachial artery is described.

2. The relative immunity of the median nerve in these injuries is discussed, with brief reference to a recent case of complete rupture. Only a single previous report of this complication could be found.

3. It is suggested that these injuries are less uncommon than the number reported would indicate.

4. The anatomy of severe displacement is discussed, with special reference to the role of the brachialis.

5. The danger of closed reduction when the relationship of the upper fragment to the neurovascular bundle is in doubt is stressed.

6. The indications for open reduction are given.