Background: Injuries to the shafts of radius and ulna are one of the most common reasons for children to receive orthopedic care. The purpose of this study was to evaluate the radiological and clinical outcome of fracture both bone forearm in children treated by elastic nail. Patients and methods: This clinical trial was conducted on 18 patients with fracture shaft of both bone forearm treated by elastic stable intramedullary nail (ESIN) in