The purpose of this study is to analyze the relationship between teachers' influence on school-level decision-making and students' school satisfaction, utilizing the sixth wave of data from the Gyeonggi Education Panel Study(GEPS). In this study, teachers' influence on school-level decision-making was measured at the school level using the mean of teachers' influence within schools. School-level decisions were defined based on prior research and categorized into three decision domains: instructional, school policies, and school administration decisions. Students' school satisfaction was measured in terms of satisfaction with academic development and overall school life and counseling. The study finds that teachers perceived their influence on school-level decision-making as 'moderate.' Teachers' influence on instructional decisions was higher than that in other domains, followed by school policies and school administration decisions. In general, when teachers have more influence on school-level decisions, students reported higher school satisfaction. However, this study finds that an increase in teachers' influence on instructional and school policy decision was positively associated with students' school satisfaction, while there was no statistically significant relationship between teachers' influence on school administration decisions and students' school satisfaction. These findings have implications for understanding the relationship between teachers' influence on school-level decisions and students' satisfaction, a topic that prior studies have barely analyzed.