Adaptability of the vestibular system to repetition of the movements of rotatory chair is one of the disadvantages of this experiment. Besides the procedure is disturbing and cause intense reactions in high acceleration. By the way, advantages such as big deal of information provided about the function of peripheral and central vestibular system prevent us ignoring this special test. In this article the procedure is explained and its application in distinguishing different pathologies of vestibular system is discussed in brief.