摘要:Grammar teaching dates back to many years ago. It is a critical issue since its importance has been clarified in second/foreign language teaching and learning. There are always some hints about a good grammar teacher, but one cannot easily find a holistic framework for a successful ESL/EFL grammar teacher. For this reason, the present study investigates the qualities of a good and effective grammar teacher based on observations and interviews. An Iranian EFL grammar teacher’s class was observed for about ten hours in order to see why his students and colleagues considered him to be a successful English grammar teacher. The results demonstrate that there are some important features for an effective ESL/EFL grammar teacher, which should be taken into account by other practitioners doing a similar job. Finally, this study provides a coherent framework for grammar teachers in order to make the outcome of their grammar lessons more fruitful.