Abstract: In school organizations, principals and teachers have a very important role. This study aims to determine the effect of the principal’s transformational leadership style on teacher job satisfaction. The population in this study was a junior high school teacher in Lampung province, Indonesia. The research sample was determined randomly. Data collection uses questionnaires distributed to teachers. Data were analyzed using normality, homogeneity, simple linear regression and T-test. Based on the results of the analysis, it is known that the transformational leadership style does not affect teacher job satisfaction with a 95% confidence level. Then, based on the results of the T-test, there was no difference in the satisfaction of teacher job between male and female teachers.