Pennig wrist fixator (Orthofix) is a dynamic external fixator which allows wrist motion in applied state in the treatment of distal radius fracture. The authors have treated unstable distal radius fracture with Orthofix external fixator and additional percutaneous K-wire fixation from January 1990 to June 1996. Among these cases, the authors analysed the clinical result of 40 cases which were available for follow-up for more than one year. The analysis was performed on the basis of the change of radiographic findings and modified Gartland & Werley criteria. The results were as follows;