This study examines the relationship between secondary school students' reflective thinking skills toward problem solving and their metacognitive awareness. Using the correlational survey method, this study selected a sample of 571 secondary school students from Afyonkarahisar province during the 2022-2023 academic year using the convenient sampling method. The study used the 'Reflective Thinking Skills Scale for Problem Solving' and the 'Metacognitive Awareness Scale for Children' as data collection tools. Descriptive statistics, correlation analysis, and simple linear regression analysis were used to analyze the collected data. According to the findings of the study, secondary school students' reflective thinking skills for problem solving and their metacognitive awareness are positively and highly related. Furthermore, the study determined that the reflective thinking skills of secondary school students for problem solving significantly predict their metacognitive awareness.