Aim of the treatment of paediatric diaphyseal forearm fractures is healing of the fractures without impairment of pro-/supination and negative cosmetic effects while avoiding traumatic experience for the patient. Stable and undisplaced fractures can usually be treated non-operatively without reduction. Stable fractures with an angulation > 10°, a torsion > 30° or a deformity narrowing the interosseous space which may impair forearm rotation should be reduced using e.g. oral analgosedation or general anaesthesia and immobilisation in a cast (if necessary, with subsequent wedging of the cast). The per se stable greenstick fractures are exceptions because of their high refracture rate of 10-35%. Hence, completion of the fracture and definitive retention with intramedullary elastic wiring should be considered. Instable complete fractures should be reduced and stabilised with elastic nails under general anaesthesia.