Dural fistulas associated with dementia are rarely reported and, among these, intracranial dural fistulas constitute an infrequent etiology. Moreover, dementia associated with dural fistulas occurs due to venous hypertension leading to ischemic neuronal dysfunction. This case report describes a male patient exhibiting unusual features of dementia with a concomitant dural fistula compromising the superior sagittal sinus. The fistula was completely occluded via endovascular embolization. Two months after the interventional therapy, clinical assessment revealed complete improvement of executive functions. Afterward, the patient returned to his daily activities without impairment.