The invention is related especially to orthopedics and traumatology in the field of medicine. It is preferred to be used for the treatment of Weber C lateral malleolus fractures. In terms of surgeons, it has been used by the surgeons and was approved by the literature. It is effective, minimal invasive and leads to rapid surgery and fast recovery. In terms of the patients, it is less painful, it leads to fast recovery and faster return to work. Fibula nail, which is applied with closed surgical technique; is used in conjunction with a guide device that identifies screw holes on the nail. It has a screw hole in the distal of the fibula nail, which allows to be send two screws at different angles, and screw holes for sending two syndesmosis screws if it is needed.