The purpose of this study is to clarify systematically the pathways for achieving “Clean-up” activities of preschoolers during three years of kindergarten. The subjects were 28 three-year old, 26 four-year old and 25 five-year old preschoolers. They were observed for one semester, from April to July. The teachers involved with these classes were interviewed about clean-up activities and preschoolers.   As the preschoolers grew older, they were more involved in cleaning up and did it in cooperation with their more classmates. And in addition, they volunteered to clean up more. They moved more easily from playing to clean up activities, and kept the place tidy for longer periods of time.   These results showed that the daily work in the kindergarten was achieved when preschoolers were able to come to terms with their feelings about wanting to play.