Percutaneous tansluminal angioplasty(PTA) was done in 38-year-old female patient with membranous obstructionof IVC in the department of Radiology, Seoul National University Hospital. After PTA, pressure gradient between right atrium and IVC was relieved from 16mmHg to 6mmHg. The collateral circulation through hemiazygos vein andreflux into hepatic and right renal vein were disappeared. PTA is suggested to be an effective method in thetreatment of membranous obstruction of IVC.