Teachers ensure the success of learning at school the magnitude and low quality of learning is caused by the teacher's abilities. This research aims to examine and explain the impact of transformational leadership and organizational commitment on teacher performance. This ex-post facto quantitative research was carried out on lower school teachers in East Lombok district and the number of teachers was 3,907 people. Determination of the number of examples is a method based on random sampling according to Krejcie and Morgan's recipe corrected with Warwich and Lininge's. The results obtained are 363 teachers. Collecting information using a closed-type questionnaire with 5 alternatives. The analysis uses descriptive statistical methods and multivariate Structural Equation Modeling and Partial Least Squares (PLS- SEM) statistics. The research results are: (1) transformational leadership influences in an important direct way the teacher's commitment to T-Statistics is 8.702 and sig 0.000, (2) transformational leadership influences in an important direct way to teachers' ability in T-Statistics is 2,700 and sig 0,007, (3) organizational commitment influences directly the teacher's ability in T-Statistics is 4,449 and sig 0,000 and (4) transformational leadership influences indirectly the teacher's ability through organizational commitment The T-statistics are 3,900 and sig 0,000. Research findings show that transformational leadership and commitment have a significant impact on teacher performance.