Olecranon fracture is one of the most common fractures. There are several fixation methods to teat it. The most popular is the tension band method. Despite the good therapy results of tension band, receding of pins is very often complicated. In order to solve the problem, especially to provide a simple and efficacious method, we designed a new fixation device made of Nitinol named as olecranon guiding memorial fixator (OGMF). Till October 1999, 21 cases had been treated by OGMF with anatomic reduction rate of 95.7%. Average 6.8 weeks after operation, the function of injured upper limb was as good as the healthy one, and no infection, rupture and nonunion was found.