Pulmonary ligament consists of 2 serosal layer of pleura that connect the lower lobe to the mediastinum.Author analyse and present CT appearance of pulmonary ligament of the 40 normal and abnormal patients on the basisof anatomic knowledge from the cross section of cadaver. Left pulmonary ligament is more frequency visualized thanthe right. The most important CT landmark in localizing pulmonary ligament is the esophagus where the ligamentattaches on its lateral wall. Pitfalls in CT identification of pulmonary ligament are right phrenic nerve andright pericardiacophrenic vessels which emerge from the lateral wall of the IVC and wall of the emphysematousbulla in the region of the pulmonary ligament.