Purpose: The purpose of this study is to clarify how care staffs construct the human relation to children while the physical environment setting for bringing up spontaneity of children, and to investigate the physical and human environmental factors that care staffs should support on continuity of the self for children in day nursery. Background: Now, the qualitative improvements of the childcare environment are needed in Japan decreased birthrate drastically. In one of these important purposes, the environmental improvement to bring up the spontaneity of children is watched. This improvement tries to offer children various concrete experiences and stimulations with higher quality by creating the childcare environment with higher quality to them who spend the best part of a day in day nursery. It is thought that not only enhancing physical environment but also enhancing human environment such as upbringing of care staff's skills to be able to support appropriately children based on continuity of the self for them is important to enable this improvement. Method: In this study, the transactions among the care staffs, the children and the childcare environment were analyzed by the behavioral tracking method for care staffs and children to every five minutes in seven hours until from nine o'clock a.m. to four o'clock p.m. and by interviewing for care staffs in two day nurseries where the environmental scale is different. Results and Conclusions: We find that the visual cues to children are important as environmental factors that care staffs should support on continuity of the self for them in day nursery. When the care is suddenly started or changed by care staffs, children became more nervous easily to be difficult to forecast the following care. As a result, their concentration gradually lost, and spontaneous playing becomes difficult more and more by such a situation's continuing. Therefore, it becomes an important environmental factor that a physical and human environmental setting for the following care is shown children as a visual cue and their interests are gradually turned to the following care.