Differentiated Learning is a teaching approach to address diverse classroom in learning process. However, in its implementation, some obstacles are often encountered by teachers. This qualitative research and applied case study was conducted in MTs Negeri 1 Banjarnegara, specifically in an English subject classroom. Data collection techniques consisting of interviews, observations, and documentation were used during the research process. Data reduction, data display, and conclusion from Miles and Hubermann were used as data analysis. The subject of this research is English teachers in MTs Negeri 1 Banjarnegara, which consisting three teachers, one for each grade. The object of this research is the difficulties of Differentiated Learning implementation in the English classroom at MTs Negeri 1 Banjarnegara. Encountered issues are specified on several terms which are teachers’ workload, limitation on the facilities, teachers’ misunderstanding, less-motivated students, and the diversity of students’ characteristics Keywords: Differentiated Learning, Difficulties, English Teacher