Multiple sclerosis is a chronic inflammatory demyelinating disease of the central nervous system. It is most likely an autoimmune disease. The disease has relapsing remitting course. The diagnosis of MS requires evidence of CNS lesions disseminated in time and place. The clinical history, neurological examinations and investigations all have key roles in the diagnosis. Vertigo and dizziness are also common symptoms in MS and it may be the initial symptom in 5 % of patients. Brainstem insults, cerebellar plaques, affection of the eighth cranial nerve root entry zone in the cerebellopontine angle are the causes of vestibular symptoms and signs in MS. Electronystagmography is the most commonly diagnostic test used to assess patients with dizziness or vertigo. The test is specifically applied to detect the presence or absence of organic pathology conditions or to monitor changes in the vestibular function. It also identifies the site of lesion whether peripheral or central vestibular origins. Computerized dynamic posturography (CDP) tried to find out whether the patient’s balance in the standing position is disturbed or not. In MS patients, the sensory information (visual, vestibular and proprioception) may become compromised and this may contribute to balance disorders. ENG and CDP are of great value in evaluating vestibular function in these patients. Accordingly, this study was done to evaluate the vestibular system function in MS patients using both ENG and CDP. In this study, a total number of 60 subjects were examined. They had an age range of 23 to 70 years and were of both genders. The subjects were divided into two groups: the control group which consisted of ten normal subjects and the study group that consisted of fifty definite MS patients diagnosed according to Poser’s criteria. Basic audiologic evaluation in the form of pure tone audiometry, speech audiometry, immittancemetry and ENG and CDP testing was done to these subjects. The present study revealed that The MS patients had SNHL of mild degree in 80% of the cases affecting mainly the higher frequencies (2-8 KHz). Computerized Dynamic Posturography was abnormal for 70% of the examined MS patients compared to 52% abnormality in Electronystagmography test results. Decreased performance on all conditions of sensory organization tests, specifically 5 and 6 with abnormally prolonged latencies on MCT is the most characteristic pattern on platform posturography. Subtle abnormalities of eye movements’ most commonly sinusoidal tracking are the most useful vestibular findings for the detection of MS. It was recommended that ENG and CDP to be done routinely on the MS patients complaining of dizziness so that appropriate management and remediation can be achieved.