INTRODUCTION: We aimed to compare the radiological and clinical results of simple displaced olecranon fractures, who underwent surgical treatment with AO tension band and locked anatomic olecranon plate. METHODS: Between 2012 and 2017, 43 patients with olecranon fractures treated surgically with AO tension band and locked anatomic olecranon plate, included in the study and retrospectively examined. Only type 2A olecranon fractures according to Mayo classification were included in the study. There were 23 patients in tension band group (group 1), 20 patients in the plate group (group 2). The mean age of the patients in group 1 was 38.1 (14 male, 9 female), group 2 was 49 (13 male, 7 female). RESULTS: Union was achieved in all patients in the study. The mean flexion-extension arc of group 1 was 130,87±12,58°, the mean flexion-extension arc of group 2 was 129±15,69°, the mean pronation- supination arc of group 1 was 176,17±3,86°, the mean pronation-supination arc of group 2 was 175,75±4,38°. The mean DASH score of group 1 was 9,44±9,66, the mean DASH score of group 2 was 10,19±12,31. The mean Mayo elbow performance score of group 1 was 85,87±12,58, the mean Mayo elbow performance score of group 2 was 86±11,77. There was no statistically significant difference between groups in terms of flexion-extension arc, pronation-supination arc, grip force, DASH and Mayo elbow performance score. From 9 patients (39.1%) in group 1, and 5 patients (25%) in group 2, fixation materials were removed at an average of 14 and 17 months after surgery due to implant irritation, respectively. DISCUSSION and CONCLUSION: Tension band wiring and plate fixation are a good alternative to each other with similar clinical and radiological results and complication rates in simple displaced olecranon fractures.