The teacher is the main component that determines the quality of the education process. Therefore, teacher performance becomes the main aspect that is of concern to everyone. In this case, the principal has an important role as the spearhead to improve teacher performance. This can be done through his leadership which can create a conducive work culture and create a good working environment. This study aims to describe and analyze: (1) Principal transformational leadership, work culture, work environment and teacher performance; (2) the influence of transformational leadership on work culture; (3) the influence of transformational leadership on the work environment; (4) the influence of transformational leadership on teacher performance; (5) the influence of work culture on teacher performance; (6) the influence of the work environment on teacher performance; (7) the influence of transformational leadership on teacher performance through work culture; (8) the influence of transformational leadership on teacher performance through the work environment. This research uses descriptive-quantitative research method. The number of samples in this study were 115 teachers. The data collection instrument is a questionnaire that has fulfilled the validity and reliability test requirements. Analysis of the data to test the hypothesis using path analysis. Based on the results of this study it was found that there is a direct influence of: (1) principal transformational leadership on a work culture of 0.832, (2) principal transformational leadership on a work environment of 0.957, (3) principal transformational leadership on teacher performance of 0.847, ( 4) work culture on teacher performance of 0.752, (5) work environment on teacher performance of 0.798, (6) indirect influence of principal transformational leadership on teacher performance through work culture of 0.626, (7) principal transformational leadership on teacher performance through work environment of 0.762. The conclusion of the research is that there is an influence of the principal's transformational leadership, work culture and work environment on the performance of public high school teachers throughout the city of Banjarbaru. It is recommended for principals to optimize the role of leadership through transformational leadership in order to improve work culture, work environment and teacher performance. Teachers are expected to always improve their performance, especially in the teaching and learning process.