The purpose of this study was to understand the kindergarten teachers' content knowledge related in 'color' theme. Eleven kindergarten teachers were interviewed by interview's script. Data were collected with teachers' interview data about content knowledge of 'color' theme. After interviewed about content knowledge related in 'color' theme, those data were analysed by inductive categorical system. The results of this study were (1) Kindergarten teachers had a lack of understanding about content knowledge related in 'color' theme (2) Kindergarten teachers did misunderstand about content knowledge related in 'color' theme. From these results, we know that we need more kindergarten teachers' education program for abtain content knowledge