Objective: The purpose of the study was to evaluate the clinical results afteroperative treatment of open tibia fractures (grade IIIA/B) with external fixator. Material andmethods: 25 patients with open fractures of the tibial diaphysis, classified as type III A and B,according to the Gustilo classification, were operatively treated in Agency Headquarter HospitalLandikotal. All the patients were treated with an external fixator. The time of the union of thefracture, problems with the union (malunion and nonunion), infection were examined astreatment outcome. Late complications and their treatment was not the object of the study. Thefollow-up period was at least 8 months. Result: The end results of the external fixation of 25 tibialshaft fractures, 18 (72%) men and 7 (28%) women, average age 37.7 (16-65). The union rate was83%. Nonunion rate was 12%. And malunion rate was 5% (fig-I). Fifteen patients had Gustilo typeIIIA injury while 10 patients had type IIIB injury (fig-II). Pins tract infection rate was 10%. Theaverage time of fractures healing was 28.5 weeks (15-22). There were 3 cases with woundinfection and no sequestrum formation. Conclusions: External fixation is a simple and effectivemeans of treating all types of open tibial shaft fractures