The olecranon fracture is intra-articular fracture anatomically. So the fracture should be reduced completely. We experienced 46 cases of olecranon fracture from January. 1985 to December. 1989.

The results were as follows ;

1) The fracture was more in adult than child.

2) The most common cause was fall down from height.

3) The undisplaced type I fractures were treated with conservative management. the results were satisfactory.

4) The displaced fractures should he treated with operative method for stability of elbow and prevention of limitation of motion.

5) The tension band wiring technique was not difficult and widely used method in treatment of displaced fracture. The most common complication was protrusion of K-wire, but careful technique would prevent the complication.