A pulmonary arteriovenous fistula is an uncommon malformation. In pregnancy altered hemodynamics and hormones cause changes in a PAVM(pulmonary arteriovenous malformation) that predispose them to deterioration. Therefore, a PAVM can cause serious and life-threatening complications in pregnancy. Death ofter results from a cerebral abscess and a rupture of the malformation with a massive hemorrhage. Recently, we experienced a case of a multiple PAVM in pregnang 38 year old woman, which could not be obseved in the old chest PA, 1 year age. The PAVM was confirmed by CT and was angiography and treated by percutaneous embolization. The patient is suspected to have HHT (Hereditary hemorrhagic telangiectasia)