This research is aimed to find out the students’ perception on the use of L1 in English classes by teachers and students at SMAN 2 Pekanbaru in the academic year 2017/2018. This is a survey research. The participants answered questions administered through questionnaire which consisted of 34 questions. The population of this research is 772 students of SMAN 2 Pekanbaru. The sample is 34 stud…