In this study, which was conducted to examine the role of school innovation characteristics in the relationship between the dominant culture type characteristics in the school and the effectiveness of the school, the School Culture, School Effectiveness, and Innovative School Characteristics scales were collected from 386 teachers working in public schools in the province of Kütahya via an online form. The data obtained from the participants was evaluated using measurement models and mediation analyses in line with the hypotheses, as well as the validity and reliability analyses and the prerequisite evaluations of the analyses to be made. According to the results obtained, while the innovative features of the schools have a full mediating role in the relationship with school effectiveness between support culture and success culture, a partial mediation effect was observed in the task culture type. In the bureaucratic culture type, no mediation effect of the innovativeness feature was detected.