The bronchopulmonary sequestration is a term used to describe an area of embryonic lung tissue supplied by an anomalous systemic artery. Two forms are recognised -extralobar and intralobar- with different clinical presentations. We have experienced a case of aspergillosis within an intralobar sequestration. The patient was 32 year-old female and had no specific complaints. The lung mass containing cystic lesion was found incidentally and confirmed to be intralobar sequestration on the operative field which showed aberrant artery in the inferior pulmonary ligament. The right lower lobectomy was done