This work examined the correlation among critical thinking, mindfulness and academic achievement among intermediate Iranian (EFL) Learners. A34 multiple-choice item questionnaire on the basis of critical thinking, a 15- item Likert- scale questionnaire based on mindfulness and a31 multiple-choice reading comprehension test were employed in this study. To fulfill the purpose of the study, 220 participants from among 250 university students majoring in English translation and TEFL were selected through administering a standardized Oxford Placement Test (OPT). Having applied the proficiency test,first the California Critical Thinking Questionnaire was administered, then the Mindfulness Attention Awareness Scale questionnaire was administered and finally the reading comprehension test selected from Actual TOEFL Test (2004)was carried out among the participants. The results showed that there was no correlation between critical thinking and reading comprehension;neither was any correlation between mindfulness and critical thinking.The correlation between mindfulness and reading comprehension was positive.