This study examined the effect of innovative school leadership and entrepreneurial teacher behaviors on school happiness according to private school teacher perceptions. The study employed a model of descriptive and relational scanning. The sample of the study consists of 270 teachers working in private schools in Turkey in the 2022-2023 academic year. In the study, innovative school leadership scale was used to determine the innovative school leadership level of principals, entrepreneurial teacher behavior scale to determine the level of entrepreneurial teacher behavior, and school happiness scale to determine the level of school happiness. The findings revealed that perceptions of private school teachers about innovative school leadership level of the principals are at a high level. Their perception of the level of entrepreneurial teacher behavior is at a high level. Perception of the level of school happiness is also at a high level. Findings showed that there is a low, positive significant relationship between innovative school leadership and entrepreneurial teacher behavior. There is a high, positive, significant relationship between innovative school leadership and school happiness. Additionally, there is a moderate, positive, significant relationship between entrepreneurial teacher behaviors and school happiness. Innovative school leadership and entrepreneurial teacher behaviors significantly predict school happiness.