In order to evaluated the efficacy of percutaneous transluminal angioplasty(PTA) in the treatment of atherosclerotic obstructive disease in the lower extremities, the results of the procedure were retrospectively analyzed for 36 lesions in 27 patients. The 36 lesions were at 23 sites in the iliac arteries and 13 sites in the femoro-popliteal arteries. The overall initial success rate was 89%. The initial success rate was 91% for the iliac artery and 85% for the femoro-popliteal artery. Complications were hematoma(1 case) at the puncture site and arterial wall dissection(1 case), but they did not necessitate emergency intervention. PTA is considered to be an effective treatment of atherosclerotic obstructive disease.