The carpo-metacarpal joint is important for thumb function and for strong pinching and grasping. Inadequately treated fracture of the trapezium can produce long term morbidity. Solitary fracture of the trapezium are uncommon, compose less than 3% of all carpal fractures in adults. However such fractures are very rare in growing patients. Routine anteroposterior (AP) and lateral radiographs of the wrist often fail to show these fractures because of the overlapping trapezoid. Special radiographic views have been described (Robert's view) to detect this fracture. Computer tomography (CT) was found to be essential for the diagnosis and proper treatment of the described injury. We report a case of sagittally split fracture of the trapezium associated with a subluxated carpo-metacarpal joint of the thumb that occurred while playing golf, which was treated by open reduction and percutaneous pinning using two K-wires.