Congenital multiple cystic disease of the lung is a loosely knitted clinical group of disease and shows various clinical and laboratory findings. It is hard to find out definite differences between the bronchogenic cyst and congenital multiple cystic disease of the lung in the embryologic developing process but we can accept the idea, the embryologic developing process is similar one. An 18 years old female patient had left lower lobe bronchiectasis and Rt. Mid. and lower lobe congenital multiple cystic disease of the lung. In BNUH chest surgery department, we managed this patient successfully by doing staged bilateral lung lobar resection.[KTCS 1979;2:89-92]