Due to the overwhelming desire in the field of English language teaching and learning all across the world; therefore, considering teacher education, and training some qualified and professional teachers are paramount. In order to have a good teacher, a qualified teacher trainer is required. This study reports a qualitative case study to find out how the participant became a teacher trainer and is there any differences between the technical terms of teacher trainer and teacher educator or not. Besides, there is an attempt to figure out the syllabus covered in teacher training courses in private English language institutes in Iran. Hence, the researcher applied a semi-structured online interview to collect data. Data analysis disclosed that there is a standard test in order to become a teacher trainer and there is a difference between mentioned technical terms as well. Further, the most part of teacher training course syllabus is designed to just teach the language and very little attention is given to the psychological aspects of teaching.