Teacher professionalism is one of the constructs that has recently attracted educational researchers' attention to improve student learning. The purpose of this study was to examine the relationships between teachers' pupil control ideologies and teacher professionalism. A total of 234 high school teachers participated in the study. This study used "Teacher Professionalism Scale" and "Pupil Control Ideologies Scale" to gather data. The results revealed that teacher professionalism was significantly and negatively related to teachers' pupil control ideologies. The results also demonstrated that pupil control ideology negatively and significantly predicted teacher professionalism. The results of the study are discussed in regard to fostering teacher professionalism in schools.