1. The indications for open reduction in congenital dislocation of the hip are discussed.

2. The technique of the operation and the post-operative treatment are briefly described.

3. The results of the operation in fifty hips are presented.

4. The function and the radiographic appearances of the hip were usually good in the early years after open reduction, but there was a marked tendency to deterioration ten to thirteen years afterwards.

5. The indications for the shelf operation and for rotation osteotomy after open reduction are discussed.