The purpose of the study is to investigate the relationship between organizational trust and school mindfulness. To achieve this purpose, a quantitative approach and relational design were preferred, and School Mindfulness Scale and Organizational Trust Scale were used as data collection tools. The study sample consisted of 495 participants working in public schools in Istanbul province. The data was evaluated using arithmetic mean, correlation and regression analysis. According to the results, trust in the principal and colleagues improves school mindfulness. Furthermore, trust in the principal increases the mindfulness of the school principal, while trust in colleagues enhances mindfulness among the faculty. It can therefore be said that school principals may prefer to strengthen organizational trust to increase the level of mindfulness within the school.