The use of metacognitive strategies of learning in universities has been identified as a key factor in learning and teaching; however, little known research has focused on the influence of portfolio method on students’ use of metacognitive learning strategies in ESP courses. This study was aimed at discussing the role of portfolio use in university studies and examining the impact of the learning portfolio on students’ use of metacognitive learning strategies while studying English for Law. The results indicate a positive influence of the learning portfolio on the use of the metacognitive strategy of organising, assessing, controlling and planning one’s learning.