This articles aims to identify the process in which students who are maladjusted at school, maintain their school lives through ‘an alternative classroom in school,’ and to see how teachers perceive the school-adjustment process and make it meaningful. To solve this problem, this study conducted interview-driven qualitative research on teachers in charge of alternative classrooms by selecting the cases that are operated separately from ordinary classes for students who are maladjusted at schools. The teachers perceived the purpose of alternative classrooms as ‘for graduation’, ‘for maintenance of school life’ and ‘providing alternative educational opportunities’. Alternative classroom activities are encouraged by teachers to give options to participating maladjusted students and find activities that they want to do independently. The purpose and operation of these alternative classes served as a ‘school life maintenance system’ for maladjusted students. The teachers perceived the main changes in students who were maladjusted through alternative classes as adjustment’ and ‘maintenance’ of school life. However, it was followed by opinions that such changes in maladjusted students only seen for a while, and thus, the fundamental problem of maladaptation could not be seen as gone. The reason why alternative classes can only serve as a temporary school life maintenance system for maladjusted students was because it was the limitations of the standardized curriculum and assessment system as well as the expected student image in class. Furthermore, a reproduction structure makes maladjusted students still be marginalized in school. Using the marginalized (separated) space and time of alternative classrooms, the scope of school adjustment standards and school education is expanded, and thus it looks like that the previously maladjusted individuals have changed and coexist in schools together. As such, maladjusted students were clearly recognized in school in the past, and today it seems that they coexist together, but as this study confirmed, they remain maladjusted and are becoming ambiguously marginalized.