The primary purpose of this study is to investigate the changes in the members of the learning community consisted of the researcher and his colleagues through the process of an action research. The study employs the action research method and develops action cycles as the action research model. For the action, related data are collected to analysis the changes in the learning community members. The research results indicate that the beginning teacher in the case has no significant growth in the ability of classroom management and the formation of positive learning environment. However, her skills in teaching and communications and expressions have significantly improved. In addition, the experienced teacher has some changes in the attitude and behaviors in mentoring the beginning teacher, and become more active in participating school affairs. The researcher obviously improved his ability in teaching and promoting the teaching projects in the school.