Reverse Hill-Sachs deformity is a term for a linear impression fracture of the anteromedial humeral head caused by a posterior shoulder dislocation, which is an extremely rare subtype of shoulder dislocations and caused by an epileptic seizure, an electric shock or trauma. Herein, we illustrate the findings of bone pinhole study, MRI and fused SPECT/MR imaging of reverse Hill-Sachs deformity caused by posterior shoulder dislocation after motor cycle accident in a 41-year-old man.