This paper reviews research articles on English grammar instruction in Korea published in the journal ofEnglish Teaching since 1965. It analyzes current trends of research studies and provides prospects for future research studies in the field of English grammar instruction. A total of 45 research papers were reviewed and analyzed quantitatively and qualitatively. The quantitative analyses revealed that over 90 percent of the articles have been published since 1990 and most of them have explored the efficacy of grammar teaching under the approach of focus on form. The qualitative analyses present thorough reviews of the published research papers with the emphasis on themes, research methods, and their pedagogical implications. The limitations ofthe published articles and some suggestions for the development of English grammar instruction are provided.