No, language can be taught effectively without its grammar. we can say grammar is the heart of language. As in human body heart supplies blood to the entire body as such grammar provides important rules for the smooth functioning of the language. Grammar is a body of the rules that governs the language. One must know it for systematic oral and written communication. Every language has a grammar. Without grammar language cannot be orderly. Therefore, grammar is the anatomy of any language and language teaching is a multidimensional activity. It derives sustenance from linguistics, Psycholinguistics, Sociolinguistics, Methodic, theories of education, Educational technology and from the experiences of successful classroom performance (Verma S.K. 1973). The aim of this article is to define the role of grammar in language teaching. It also describes how grammar helps to learn language in our practical life. There is no doubt that the knowledge implicit or explicit in grammatical rules is essential for the mastery of a language. Grammar may be roughly defined as the way; a language manipulates and combines words in order to form longer units of meaning and it also defined as the underlying structure of a language that a native speaker of that language knows intuitively. However we can fairly say that Grammar is a controller and a proper guide to the language. Keywords: psycholinguistics, sociolinguistics, multidimensional, anatomy, sustenance, manipulates, intuitively.etc.