Percutaneous transluminal angioplasty is world wide prevalent method for treatment of vascular occlusive disease. Its advantage is avoidance of major surgery as well as decreased cost with shortened hospital days. In renal arterial stenosis, successful angioplasty produces draumatic reduction of blood pressure in renin dependent hypertension. Even in renin independent hypertension, blood pressure may be easier to control with antihypertensive medication following renal arterial dilatation. We have performed 2 cases of percutaneous transluminal angioplasty in renal arterial stenosis recently. One patient, 58-year-old female, has gained normal blood pressure after angioplasty, while the other showed not very satisfactory blood pressure control because of chronic bilateral renal parenchymal damage.