This study aimed to validate the Chinese School Attendance Reason Scale (CSARS) for assessing junior high students' reasons for school attendance and examine the relationship between school attendance and school adjustment among Chinese students. Participants included three independent samples of 1,235 students from four Chinese provinces. Exploratory and confirmatory factor analyses indicated a four-factor scale: external pressure, norm, school attractiveness, and habit. The CSARS' measurement invariance was generally supported, and test-retest reliability and predictive validity were examined. A multiple regression analysis was also conducted with each school attendance subscale as an independent variable, and school adjustment as the dependent variable. Since external pressure and school attractiveness strongly influence school adjustment, school support services should address these variables.