English Pronunciation instruction is difficult for some reasons. Teachers are left without clear guidelines and are faced with contradictory practices for pronunciation instruction. There is no well-established systematic method of deciding what to teach, when, and how to do it. As a result of these problems, pronunciation instruction is less important and teachers are not very comfortable in teaching pronunciation in their classes. This paper reviews some of the important issues of English pronunciation instruction. The aims of this paper are to define the term pronunciation, discuss the goal of pronunciation instruction, explain the importance of pronunciation instruction, elaborate the role of teachers in teaching pronunciation, and finally mention some suggestions in helping teachers to improve learners’ pronunciation. The review of literature shows that if teachers want to teach pronunciation accurately they should be trained in pronunciation instruction.