In this technological era, educational institutions are facing many challenges to improve their performance of the institutions through successful leadership behavior. Effective leaders play an essential and important role in accomplishing the target goals for the betterment of organizations through making subordinates committed. The aim of this study is to investigate the impact of headmasters’ transformational leadership style on teachers’ organizational commitment in Primary Tamil Schools in the state of Kedah, Malaysia. The measuring instruments used in the study were Multifactor Leadership Questionnaire (MLQ Form 5X) and the Three-Component Model (TCM) survey for organizational commitment. The stratified random sampling technique was used to collect data from 346 teachers from primary Tamil schools through a survey method. Data were analyzed descriptively by using Statistical Package for the Social Sciences (SPSS) and utilized the Structural Equation Modeling technique on higher-order constructs to test the hypotheses of the study by using Smart PLS statistical software. The study’s findings revealed that headmasters’ transformational leadership style has a significant impact on teachers’ organizational commitment. This study also contributes empirical evidence for leaders (Headmasters) to enhance their leadership attitudes to be a more efficient and suitable relationship with teachers’ organizational commitment.