Background: The lungs are the essential organs of respiration. Fissures are an integral part of human lung. The fissures in lung enhance uniform expansion. These fissures may be complete, incomplete or absent. A detailed knowledge of variations of classical and accessory fissures is necessary for proper radiological interpretation. It is a guide to cardiothoracic surgeons performing segmental lung resections, lobectomies to have an uncomplicated perioperative outcome. Considering the clinical and anatomical importance of this topic, the present study is undertaken. Aim of the study: The cadaveric study was done to note the morphological variation of the fissures of lung and compared it with previous studies. Results: In the present study among 40 adult human cadaveric lungs, the following observation was made; right sided lungs had incomplete oblique fissure in3 lungs, incomplete horizontal fissure in 10 lungs. Left sided adult lungs had incomplete oblique fissure in 7, absent oblique fissure-1, accessory fissure-3 lungs. Conclusion: Knowledge of normal and abnormal morphological variation is very important for the clinicians, radiologist and surgeons in order to avoid misinterpretation and misdiagnosing and preventing the untoward incidents.