The purpose of this study was to explore the relationship between teachers¡¦ leadership behavior of elementary school and classroom management effectiveness. The subjects were sixth grade students of public elementary school in Kaohsiung. This study used stratified random sampling; 928 questionnaires were taken back including 895 ones valid, at a ratio of 96.44%. This study adopted questionnaire survey, ¡§Teachers¡¦ Leadership Behavior Scale¡¨ and ¡§Classroom Management Effectiveness Scale¡¨ were used as instruments. The collected data were analyzed by t-test, One-way ANOVA, Pearson correlation, and stepwise multiple regression analysis. The conclusions of this study were as follows: 1. The present status of elementary school teachers¡¦ leadership behavior is over the average. They perform best on ¡§intellectual stimulation¡¨ and ¡§active management-by-exception ¡¨ but worst on ¡§passive management-by-exception¡¨. 2. The present status of elementary school teachers¡¦ performance on classroom management effectiveness is over the average. They perform best on ¡§teaching quality¡¨ but worst on ¡§class manners¡¨. 3.Better performance in teachers¡¦ leadership behavior was found for the ones who were female, 6 to 10 years of serving, and at schools with the scale under 24 classes. 4. Better performance in classroom management effectiveness was found for the ones who were female, 6 to 10 years of serving, at schools with the scale under 24 classes,and with the number of students between 21-30 in class. 5. The better is the teachers¡¦ leadership behavior, the more outstanding is their classroom management effectiveness. There exists the strongest correlation between ¡§individualized consideration¡¨ and ¡§classroom atmosphere¡¨. 6. Teachers¡¦ leadership behavior is crucial in enhancing classroom management effectiveness. The prediction capability of ¡§individualized care¡¨ for the whole classroom management effectiveness is the most significant.