Multiple Progressive Intracranial Arterial Occlusion (MPIAO) is a rare cerebrovascular disease and its clinical diagnosis is nearly impossible and dianosis depends upon neuroradiological studies. Among neuroradiological stuides, cerebral angiographyu is mandatory in diagnosis and in localization of stenotic or occlusive vascular lesion, visualization of collateral channels and aid the surgical management. Five cases MPIAO which were proved by cerebral angiography at Capital Armed Forces General Hospital during last 5 years are presented, with analysis of raiological findings as well as clinical assessment. The results are as follows ; 1. Age distribution ranges from 23 to 46. For cases are male and one female. 2. Cardinal clinical symptoms are headache and vomiting, and neurological mamifestations are hemiplegia and speech disturbance. 3. All cases show the characteristic angiographic findings of MPIAO which are occlusion or stenosis at the distal internal carotid artery, pr ximal part of anterior and middle cerebral arteries with fine collateral network in basal ganglia area, leptomeningeal anastomosis and transdural external-internal carotid anastomoses, The major region of occlusion or stenosis is first portion of anterior and middle cerebral arteries. In one case, the lesion is seen in cervical portion of internal carotid artery. There is no evidence of occulusion or stenosis in vertebral angiogram. 4. In 2 cases, computed tomography was done. One case shows the findings of cerebral infarction and the other intracerebral hematoma.