This study determined the mediating effect of work values on the relationship between reflective thinking skills and positive personality traits among 310 teachers in the Division of Davao del Sur, Philippines using a non-experimental quantitative descriptive-correlational research design. Weighted mean, Pearson r, and path analysis using AMOS were used to analyze the data. Findings revealed significant relationships between reflective thinking skills and positive personality traits, between reflective thinking skills and work values, and between work values and positive personality traits. Employing path analysis, results revealed a complete mediation of work values on the relationship between reflective thinking skills and personality traits among public elementary teachers. This indicates that work values are only one of the reasons how reflective thinking skills can influence positive personality traits.