This article looks at how grammar can contribute to reading comprehension. First, we discussed the concept and scope of grammar. The discussion of the concept and scope of grammar is necessary in terms of showing the rendezvous aspect of grammar and reading education. In this paper, we discussed the grammatical knowledge which is the intellectual foundation of the Korean language proficiency. Reading was divided into reading of letters and reading of meaning, and the knowledge of grammar involved in each was discussed in relation to reading. Character reading has shown that phonetics, phonology, and Korean norms are involved. The meaning reading is divided into de-contextual reading and context-dependent reading, and the former is related to morphology, lexical theory, syntax, semantics, and the latter is related to pragmatics, discourse analysis and text linguistics.