The aim of this article is to explain and evaluate; the importance of “Music Therapy”, to show its historical progress, the effects on human being and to exist the place it takes in psychology science. In this report, while explaining the importance of music therapy and taking into consideration its historical development; the treatments with music in Africa, America, Asia and Europe has been emphasized and also historical progress of such kind of treatment in Pre-Ottoman Turks and Ottoman Empire has been worked. Apart from these, the effects of music on human being, positive results that treatment with music has on people, the place that music has in medical science and the types of music therapy are also take place in this article.