This study investigated the relationship between the reading comprehension abilities in Persian (L1) and English (L2) of 109 Iranian EFL learners at intermediate proficiency levels. The participants completed standardized reading comprehension tests in both languages. Statistical analysis found no significant correlation between the learners' scores on the Persian and English tests. This suggests there is no significant relationship between the learners' reading comprehension abilities in their first and second languages. The study aimed to provide insight into how L1 abilities may or may not transfer to L2 reading comprehension to help inform EFL teaching practices.