Non–alcoholic fatty liver disease (NAFLD) is one of the types of fatty liver which occurs when fat is deposited in the liver due to causes other than excessive alcohol use. NAFLD is the most common liver disorder in developed countries. NAFLD is related to Diabetes mellitus and the metabolic syndrome. Up to 80% of obese people have the disease. Non–alcoholic steatohepatitis  is the most extreme form of NAFLD, and is regarded as a major cause of cirrhosis of the liver of unknown cause.  Most people have a good outcome if the condition is caught in its early stages. In our study we will find out the prevalence of Non–alcoholic liver disease in patients of Diabetes mellitus.