Twenty cases with skin defect of forearm and hand were treated by free skin graft with subcutaneous fat from 0.5 to 0.7 cm in thickness. The maximal area of free skin graft is 27×10cm, and the smallest one is 1.5×2cm. All of skin flaps survived except one having partial necrosis. Follow up shown round external figure, clasticity, and no change of skin color. It preserved the function of sweat gland and the cutaneous sensation began to recover 4 months postoperation.