The purpose of this study is to understand the characteristics student teachers, the context of student teaching, and the change of student teachers based on student teachers' perspective in early childhood education. This study will give information to better understand student teachers, and to make for a the climate to better support student teachers. The subjects of this study were 42 student teachers who experienced student teaching at kindergartens in the Chungbuk province of Korea. They each wrote 12 journals individually during student teaching for four weeks. Student teachers' journals were analysed, categorized, and interpreted. The following results were obtained from this study. First, student teachers experienced uncertainty such as emotional anxiety, immature thought, and vagueness of role. Second, not only kindergarten climate but children, cooperating teachers, and peer student teachers brought positive or negative support to student teachers. Third, student teachers reflected on teaching through the process of observation, participation, and practice, and they started to understand the teaching profession, and discovered the positive changes of themselves as teachers. Therefore they went a step further towards early childhood teaching.