Bivalve humerus orthosis that allows to immobilize, protect and stabilize the focus of diaphyseal fracture of the humerus, through a tight compression. It is made of a material that is thermoformed in low density polyethylene, and is covered with a padded textile cover to provide greater comfort, and thanks to its inner lining of honeycomb fabric, helps to transpire sweat to prevent moisture. It includes two 2 thermoplastic valves assembled in the lining joined by means of the elastic ejido and a system of adjustment by means of two humeral straps in velour and closing microgancho.