This study was to investigate the mediating role of teachers’ trust in the relationship between transformational leadership of school leaders and teachers’ self-efficacy among public school teachers in the Magsaysay North and South Districts. A stratified random sampling technique was used, which included 315 teachers as respondents. Through non-experimental quantitative mediation analysis utilizing path analysis, validated questionnaire, mean, regression techniques, and Pearson r, results showed significant relationships between transformational leadership of school heads and self-efficacy of teachers. There was no mediation on the impact of teachers’ trust on the connection between transformational leadership and teachers’ self-efficacy in public school teachers. Thus, teachers’ trust is not one of the causes why transformational leadership of school heads can influence teachers’ trust in public school teachers. It cannot account for the relationship between the two variables.