In this researh, it is aimed to determine the impact of motivational language which school principals use on teachers' organizational commitment. The research was designed in a quantitative research and survey model. The data were collected from 826 teachers who work in 58 public schools at the high school level in Çanakkale, Turkey, using the "Organizational Commitment Scale for Teachers" and the "Motivational Language Scale". The data were entered in SPSS program and analyzed by frequency, percentage, Kruskal Wallis-H test, Mann Whitney-U test, correlation and multiple regression. In addition, it has been determined that there is a highly significant relationship between motivational language and organizational commitment according to teachers' perceptions, and that the motivational language used by school principals significantly affects organizational commitment.