Improving education quality needs sustainable efforts; one of them is by doing Total Quality Management (TQM). TQM can be implemented not only in an educational institution's organization but also in the teaching learning process. This study aims to investigate the implementation of TQM in SMP 1 Bawen, especially in the teaching learning process of Christian. Employing descriptive qualitative approach, the data needed for this research were gathered using interview, observation, and documentation. The result shows that the learning process of Christian lesson has applied five principles of TQM: focuses on the users (students) by handling the students' problems and uses learning methods that suit the students' need, does sustainable improvement to the students' learning achievement, build shared commitments, evaluates the students' achievement, and involves the school stakeholders. However, it still needs improvements on some points of TQM principles.