The purpose of this action research was to investigate the effect of extensive reading and related activities on the acquisition of lexical chunks in EFL students. Seven adult EFL learners with an Intermediate level volunteered to take part in the 16 week project following Extensive Reading principles combined with tasks based on the Lexical Approach. Quantitative data was gathered and analysed using statistical formulae. The test carried out by the participants at the end of the project showed a statistical difference favouring the knowledge and awareness of lexical chunks. This test took the form of a questionnaire and an interview, and revealed a positive attitude in students towards the extensive reading approach.