Introduction: Idiopathic intracranial hypertension (IIH) is a syndrome characterized by elevated intracranial pressure that usually occurs in obese women in the childbearing years. The annual incidence of IIH is 0.9/100,000 persons and 3.5/100,000 in females 15 to 44 years of age. Aim of the study: To evaluate the prevalence of the venous sinus disease in the etiology of Idiopathic Intracranial Hypertension (IIH) using digital subtraction cerebral angiography (DSA) in venous phase. Material and Methods: Total 18 patients admitted with symptoms and signs of Idiopathic intracranial hypertension (IIH) in department of neurosurgery and neurology CNMC&H during the study period will be included in present study during January 2017 to December 2018. Complete general and neurological assessment, Lumbar puncture (LP), Full ophthalmologic assessment and CT scan brain ±MRI brain without contrast or Digital subtraction angiography (DSA) (venous phase) was done. Results: The mean age group of 30.4(+ 6.24) years. Idiopathic intracranial hypertension is mostly found in female i.e.88.9%. IIH Patients with higher grade of papilledema having higher CSF opening pressure. Dural venous sinus stenosis or hypoplasia in cerebral angiogram (DSA) is present in 12(66.7%) IIH patients. Sensitivity of MR Venography in this study is 91.7% and specificity is 50%. By applying chi-square test, the differences were significant at p value of <.045. Conclusion: Idiopathic intracranial hypertension (IIH) is a well-known but under- investigated clinical entity with an unsolved pathophysiologic background. However, MR venogram is good screening tool to exclude the possibility of cerebral venous sinus involvement.