Introduction: Intubation and maintenance of the patient’s airway is one of the most important steps in anaesthesia practice and a fundamental responsibility of the anaesthesiologist. Difficult intubation has been associated with serious complications particularly when failed intubation results. Materials and Methods: This study will be conducted in Department of Anaesthesiology at Tertiary Hospital, Bangalore. It is multispecialty hospital having all specialties with very good number of case load. Hospital have highly equipped Anaesthesiology department. The study will include 300 Adult patients posted for elective surgical procedures under General Anaesthesia. Results: Three hundred apparently normal ASA grade 1&2 adult patients in the age group 18 - 60yrs of either sex posted for elective surgical procedures were prospectively studied. DISCUSSION: In earlier days anaesthesia was induced by anaesthestic vapours given through face mask. Due to inability to maintain a patent airway, adequate depth of anaesthesia for surgical procedures and its complication leading to morbidity and mortality led to development of safer anaesthetic practice by maintaining anaesthesia through endotracheal insufflation. Conclusion: The present study has shown that the combination of modified Mallampatti test and thyromental distance is better than when used alone in predicting difficult intubation