This study aims to investigate the impact of metacognitive awareness and self-efficacy beliefs of middle school students on their level of foreign language learning anxiety by using structural equation modelling. A total of 285 7th and 8th grade students from a middle school in Turkey during the 2018-2019 academic year were included in the study. In the study, Personal Information Form, Foreign Language Anxiety Scale, The SelfEfficacy Questionnaire for Children, and The Junior Metacognitive Awareness Inventory were used as data collection tools. As a result of the study, the descriptive statistics indicated that the students had moderate levels of metacognitive awareness, self-efficacy beliefs, and foreign language learning anxiety. According to the results obtained from the structural equation modelling, it was concluded that the metacognitive awareness levels of the students did not have a mediating effect on the relationship between the students' level of foreign language learning anxiety and self-efficacy beliefs. In conclusion, it was determined that metacognitive awareness, self-efficacy beliefs, and foreign language learning anxiety are individual differences which interact with each other and are of great importance in foreign language learning, and that metacognitive awareness and self-efficacy beliefs have the power to affect foreign language learning anxiety.