Learner-centered classes refer to engage students in their process of learning as well as their evaluation, while, the classical way to teach and assess students was teacher based. Accordingly, the current study investigated to compare the impact of teacher assessment and self - assessment on reading comprehension on Iranian EFL learners. The current research was carried out in Kish Institute of Science and Technology of Ilam. To investigate, there were 30 EFL learners, out of a population of 79, selected based on Oxford Quick Placement Test (OQPT) in the level of intermediate. Prior to the treatment, Likert scale questionnaire applied by the teacher to assess the participants’ ability to figure out and answer reading questions. To set out the study, the participants were classified into two different groups namely; base group (teacher assessment); experimental group (self - assessment) included 15 participants in each group. In continue, these two groups received a pre-test. Additionally, after performing the treatment course, which was included 10 sessions (two sessions a week) that per each session 45 minutes allocated, the students of two groups were given the post-test. It was followed with giving the follow-up test after a week from finishing given post-test to two groups. To analyze the data, SPSS was performed. The instruments used in this study were Likert scale questionnaire, OQPT Test ,and Quiz Sheets .All in all, regarding to the outcome of this research ,students play magnificent role in their learning and evaluation process. تفاصيل المقالة