The invention relates to a device for the osteosynthesis of fractures and luxations of the neck of the humerus. The device is designed as a U-shaped pin consisting of a bioinert metal, said pin being 10 cm long with a distance of 1 cm between the limbs and being curved through a radius of 9 cm along its length. This reduces the traumatism of the soft parts during osteosynthesis, prevents the development of post-operative complications caused by infections and avoids damage to the axillary nerve and dislocation of the fracture fragments after osteosynthesis.