摘要:Critical thinking helps the discovery of the meaning of a concept about something that being learnt. Accordantly, critical thinking should be infused in teaching Islamic education (IE) for the potential to an effective teaching. Yet, there are some flaws in the teaching of critical thinking in IE among the secondary schools in Malaysia. Therefore, this qualitative study purposely, designed to discover the barriers that being encountered by the Islamic education teachers (IET) in conducting lessons with critical thinking in IE. Data w ere collected through interviews, lesson observations, and document analysis on six IETs. The finding shows that there are five main themes of barriers that have been faced by the IETs which are : time constraint, limited of teachers’ knowledge and skills, students related problems, limited facilities and physical surrounding of the classroom which less supporting the thinking activities.