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The study aims to determine the effect of Principal Leadership on Achievement Motivation, the influence of School Climate on Achievement Motivation, the influence of Principal Leadership on Teacher Work Commitment, the influence of School Climate on Teacher Work Commitment, and the effect of Achievement Motivation on Teacher Work Commitment. This research was conducted in 2019 to state junior high school teachers in Tanjung Morawa sub-district, with a population of 235 teachers. The number of samples determined by Slovin formula obtained 148 teachers, taken with the Proportional Random Sampling technique. Data collection was carried out using a questionnaire after being trialed. Validity Test is done by Product Moment Correlation and Reliability test using Cronbach Alpha coefficient. Data analysis techniques used are descriptive analysis, test requirements analysis, and hypothesis testing using path analysis. Research findings that Principal Leadership has a direct positive effect on Achievement Motivation, School Climate has a direct positive effect on Achievement Motivation, Principal Leadership has a direct positive effect on Teacher Work Commitment, School Climate has a positive direct effect on Work Commitment and Achievement Motivation has a direct effect on Teacher Work Commitment. To increase the Teacher work Commitment can be done by increasing the Principal Leadership, School Climate and Teacher Achievement Motivation.