Background: The olecranon process of the ulna enhances stability and strength of the elbow joint but it is susceptible for fracture because it lies subcutaneously. Multiple options exist for the management of this fracture. This study was aimed to evaluate the functional outcome of olecranon fracture treated with precontoured locking compression plate which provides adequate stability and achieves fracture union in case of both simple and comminuted olecranon fractures. Material and Methods: It was a prospective cohort study of 32 cases of olecranon fracture who were treated with open reduction and internal fixation with precontoured locking compression plate in Bokaro General Hospital in between July 2017 to June 2019. Evaluation of functional outcome were done by Mayo elbow performance score and serial radiographs in follow-up. Results: All fractures are united. Out of 32 patients, 20 (62.5%) were males and 12(37.5%) were females. Average age was 47.90 years. According to Mayo classification 8 cases (25%) were of mayo type 2A, 11cases (34.37%) were of mayo type 2B, 10 cases (31.25 %) were of mayo type 3A and 3 cases (9.38%) were of mayo type 3B of olecranon fractures. patients with excellent results were 21 (65.62%), 6 cases (16.75%) with good results, fair results was noticed in 4 cases (12.5%) and 1 case (3.13%) seen with poor result. Conclusion: Precontoured LCP provides good stability by its precontoured shape and thus helps in early mobilization, specially in communited fractures where other modes of fixation often tend to delay the process of mobilization because of lack of stability.