A muscle transposition technique for reconstruction of soft tissue loss and skin defects with exposed bone in the leg is described. Reconstruction with muscle flaps and freee skin grafts is a reliable and convenient one-stage operation. The gastrocnemius and soleus muscles were used to cover the upper and middle third of the leg. The method was used in 13 patients, and there were 3 failures in the series because of the impaired vascularity of the injuried leg. In 7 cases, including one failure, the soft tissue injury was associated with compound fractures. No functional disability was observed in the leg, ankle or foot after successful transposition of the muscle flap.