Rotation-plasty procedure was first done by Borggreve, in 1930 for the congenital short femur. Recently this procedure was used for the malignant bone tumor at the distal femur by Kotz and Salzer in 1982. In spite of its cosmetic problem of the distal stump, this procedure has great functional advantage of converting the above-knee amputation to the below-knee amputation. The authors applied this procedure in case of severe soft tissue crushing and large bone defect from the distal femur to the proximal tibia by the rail-road accident. Conventional below-knee prosthesis with thigh corset gave him normal ambulation. The inverted foot was good to control the prosthesis as a below-knee stump and heel functioned as a patella to support the body weight.