Background: The fundamental idea behind fracture therapy is to first achieve a precise fracture reduction before using an immobilization technique that will keep the reduction in place. In order to compare open reduction internal fixation (ORIF) by plate vs Nancy nails in the management of diaphyseal femur fracture in children, the objective of this study was to evaluate the radiographic and functioning results. Methods: This prospective, randomised work was carried out on 30 individuals with diaphyseal fractures of the femur. Patients divided into 2 equal groups: group A (Plate group): was treated by ORIF using plates and screws and group B (Nancy group).: was treated by fixation using Nancy nails.