Abstarct-A case study was narrative-biography approach. The purpose of the study was to explore in the way of self developing to be teacher as researcher in context, method, turning point for developing and teacher’s emic and characteristics. A case was one elementary teacher who was well known atv classroom action research. Interviewing, observation, documentary and artifacts studying were used for collecting data. Data was analyzed by inductive analytic method. The study result was as follow: a case was woman teacher who finished in B.Ed. and has taught in this school for 28 years. The educational reform in 1999 was the most affect for her to improve classroom action research. She has used every methods for enchancing herself to be good at classroom action research. Finally she evaluated herself and found that her knowledge and ability in classroom action research was not well. So, she stopped going out to improve herself in classroom action research. After that she paid attention to be a good teacher: doing a lesson plan, teaching, assessment, reflection and revising her learning management. Her characteristics is a good practice. She was pround in herself that her students were good at their learning outcomes. Keywords-component; case study, narrative-biography, teacher as researcher