Since March 1988, 7 patients with lumbosacral bed sore were repairing by Dufourmentel Flaps. The defects of bed sore were 4 X 5 cm to 9 X 8 cm. Excellent results were obtained. There was no case of recurrence after 18 to 30 months follow up. The advantages of this method are that the design and procedure are easy to perform by any beginner in plastic surgery. The theory and design of Dufourmentel Flap are present, operative technique are discussed in this article.