We present an analysis of a retrospective study of 61 humeral shaft fractures, stabilized with a thin AO tibial nail. All fractures were analysed according to the AO-classification. Follow-up included 48/61 patients and averaged 82 months. Local complications were postoperative radial nerve palsy in 1/61, infection in 0/61 and non-union in 4/56. A good result in shoulder function was obtained in 41/48 cases.