Background: The objective of this study was to evaluate the results of our experience in open reduction and internal fixation of fractures of calcaneus. Methods: In a quasi experimental study, 20 patients with mean age of 35.5 years (15-69 years) with calcaneus fracture - grade II and III- underwent surgery with open reduction and fixation in a 5-year period in a training hospital in Tehran-Iran. The patients' profile, Bohler and Gysan angles before and after surgery were measured and statistically analyzed. Results: Post surgery Bohler and Gysan angles showed significant improvement (p=.000). Open surgery with internal fixation contributed to improving the angles. The questionnaire with a 4-6 months follow-up showed that the average American Orthopaedic Foot and Ankle Society (AOFAS) score and Food Function Index (FFI) score was good or excellent in 80% and fair in 20%. Overall, 7 patients had complications after surgery, which were controlled successfully painted patients have had good results after surgery. Conclusion: The results of calcaneus fractures treated with open reduction internal fixation surgery have a positive effect and are in line with previous studies.