This study is about the English teacher perceive impact of reflective teaching in improving their teaching performance at an Islamic Boarding School in Banda Aceh. This study uses a qualitative method with an interview as the data collection to obtain the benefit of reflective teaching which perceived by English teachers. Total sampling technique was used to recruit participants and collected the data through applying 10 semi-structured questions of interview with six English teachers at an Islamic Boarding School in Banda Aceh. This study was conducted to explore how teachers perceived impacts of reflective teaching practice in their classroom toward their teaching performance. The result of this study showed that all participants have a positive view toward reflective teaching practice because it assists them to increase their teaching skills and positively affects their performance such as increasing teacher awareness of their teaching performance, improving teaching ability in regulating the classroom, help teacher to be a good teacher in the future and having a good understanding about their students. Based on the findings, we can conclude that reflective teaching practices improved many aspects of teachers and affected to the development of students in their learning process.