Deep venous thrombosis (DVT) is a relatively common occurrence after renal transplantation. The incidence of it is 3-8.3% in other series and is highest (70%) in the first 6 months after transplantation. In this study the incidence and some risk factors of DVT and its management were evaluated. In a retrospective and cross sectional study 318 renal transplant patients (M/F = 202/116) were evaluated. The clinical records of all patients were reviewed. Several parameters were studied, including: sex, age, weight, height, BMI, transplant time, history of diabetes mellitus, history of DVT, time of post transplant DVT, site of DVT, pulmonary embolism diagnosis and management, serum creatinine, hemoglobin, immunosuppressive drugs. The incidence of DVT in our patients was 2.5% (8 patients), M/F = 7/1.The mean (±SD) of age, weight, Cr in these patients were 53.88±10.6 years, 80.62±15.28 kg, 1.28± 0.18 mg/dl, respectively. History of diabetes mellitus was positive in 75 %( 6 patients). 50% of DVT were in the first 4 months after transplantation. There was significant difference between patients with DVT and other patients in parameters of age, weight, and diabetes mellitus. We did not have pulmonary embolism in our patients. There was one diabetic patient with recurrence of DVT after withdrawal of anticoagulant drug. The incidence of post transplant DVT in our patients is relatively lower than other reports. Risk factors of it are diabetes mellitus, obesity and older age. We recommend continuing treatment with anticoagulants in diabetic patients with DVT.