Fractures of forearm bones in children and adolescents have traditionally been treated conservatively by closed reduction and slab. When acceptable closed reduction cannot be achieved or maintained, surgical intervention is required. To compare the clinical and radiological outcome of Adolescent Both Bone Forearm Diaphyseal fractures treated with Elastic nails and Compression plates fixation aged between 10-16 year, and to clarify the benefits and complications of both procedures. A prospective work to compare two groups of patients, the first group included patients treated by elastic stable intramedullary nails. The second group included patients treated by open reduction and internal fixation by plates and screws, and above elbow slab for 6 weeks. The results of this study were described as found at last follow-up visit ranged from 1 to 3 months. There was no statistically significant difference between the two studied groups regarding the time lapsed. There was not statistically significant between the two studied groups regarding the duration of radiological union. There was not statistically significant between the two studied groups regarding the duration of radiological union (P> 0.05). There was no statistically significant difference between two studied groups regarding the incidence of complications and duration of hospital stay. Elastic intramedullary fixation for the management of adolescent closed unstable forearm fractures as well as type 1 open fractures is the method of choice because minimal invasive osteosynthesis, shorter operating times, and easier hardware removal.