Introduction and importance: Supracondylar humerus fractures are common in children but open type is very rare (almost %1 of all supracondylar humerus fractures) and the treatment strategy for these fractures is yet to be standardized. Case presentation: 11-year-old boy was brought to our hospital with pain in his left arm with high energy trauma history of motor accident. On the first examination the elbow was found swollen and 3 cm wide wound observed on the flexor aspect of the elbow and the median nerve was seen stretched on the distal humerus. We shared the 6-month results of our patient who was fixed with Kirshner-wire after open surgery and reduction. Clinical discussion: Although open supracondylar humeral fractures are rare, care should be taken in terms of neurovascular injury and infection in these patients. It should be followed closely in terms of loss of reduction in the postoperative period. Conclusion: In these cases, the patient should be called to close controls, and the time of removal of splints and wires should be adjusted well.