Shoulder arthrodesis, while providing a useful and predictable solution to many problems associated with glenohumeral degeneration, has been less than desirable for many patients due to the frequent need for postoperative spica cast or airplane splint immobilization. A new technique of external fixation of shoulder fusions has been developed that provides many advantages, including strong, reliable fixation, obviating the need for bulky casts or splints, and immediate postoperative use of the involved arm. This technique of shoulder arthrodesis using the Hoffman external fixation device has been used on four patients, with a follow-up period of 30-36 months. The series includes patients with infected arthroplasty, osteoarthritis, tumor, and previous failed arthrodesis. Bony union was obtained in six to 10 weeks, and the external fixation frame was left in place seven to 14 weeks. In each case, the external fixation frame enabled the patient to use the involved arm immediately after operation.