Liposuction is a useful method for debulking free flap. Recently, ultrasound assisted liposuction(UAL) has been reported to have many advantages over conventional suction-assisted lipectomy. We applied the UAL to debulk free fasciocutaneous flap of the forehead and lower extremities. The result was satisfactory and there was no significant complications worth noting. Although the cost can be expensive, it has many advantages such as less blood loss, larger amount of fat aspirate and better skin contraction. We can conclude that UAL can be a useful alternative method to debulk free fasciocutaneous flap.