Arabic language has certain characteristics which typically differs with other languages. The knowledge of this will be of benefit of every non-Arab learner to grasp the understanding of the language. Hence, comparative linguistic discourse is very important for non-Arab learner in order to study Arabic language. This discourse will help them to understand certain general characteristics of the language so that it can enable them to interact easily with the language and practice it for the full acquisition of the language. This article will explore the comparative linguistic and the teaching of Arabic language for Indonesian students. The roles of the comparative linguistic in Arabic teaching will also be examined. In order to gain comprehensive understanding of its roles, several cases of language mistakes by Indonesian students will be analysed as well. The final part of this article will discuss the importance of the comparative linguistic in the compo­sition of the syllabus or curriculum of Arabic language teaching.