This study sought to explore the relationship between mindfulness, coping self-efficacy (CSE) and foreign language anxiety (FLA) among a sample of 295 Iranian English as a foreign language (EFL) learners. Further, the capacity of CSE in mediating the relationship between mindfulness and FLA was tested. The participants were administered self-reported questionnaires. Structural equation modelling (SEM) was utilised. The results of SEM analysis showed that higher levels of mindfulness were associated with lower levels of FLA and greater CSE. In addition, it was found that CSE could partially mediate the relationship between mindfulness and FLA. Implications are discussed.