Fatty liver is the most common chronic liver disease in Western industrialized countries. However, there is evidence on correlation between management of fatty liver risk and diabetes. In this regard, the current study was conducted to find the relationship between fatty liver and diabetes in patients admitted to hospitals affiliated to Tehran Shahid Beheshti University of Medical Sciences .This descriptive correlational study was conducted on 180 patients admitted to the hospitals of Shahid Beheshti University of Medical Sciences in Tehran. The instruments used in this study included demographic and clinical characteristics of patients such as serum levels of cholesterol, LDL, HDL, triglycerides, hemoglobin and liver horns. Results were analyzed using t-test and chi-square tests .According to ANOVA tests, significant difference was found among indicators of LDL, triglycerides, cholesterol and ALT so that with an increase in triglycerides, HbA1c level also increased (05/0> P). On the other hand, by reducing HDL, the indicator of HbA1c increased. In addition, significant relationship was found between indicators of ALP and triglycerides so that with an increase in triglyceride and ALP, FBS level also increases (P<0.05). Due to the great impact of obesity and type 2 diabetes at an increased risk of non-alcoholic fatty liver disease, regular exercise and physical activities appropriate with age, low-fat diet, weight loss and different treatments to control diabetes and hypertension are recommended to reduce nonalcoholic fatty liver disease.