Shoulder dislocations are the most common joint dislocations, and only 2% of these are seen as posterior shoulder dislocations. The fl oating elbow was fi rst described in children, after that shown in adults. Floating elbow cases are very rare, and usually seen with high-energy trauma. Classical defi nition is the coexistence of the humeral diaphyseal and forearm fracture, but there are other defi nitions as well. The combination of the humerus body fracture and the anterior shoulder dislocation was described by Winderman in 1940. But the association of a posterior shoulder dislocation with a fl oating elbow has never been seen before in the literature. In this study, a case report of a patient with fl oating elbow and posterior shoulder dislocation is presented.