Recently, the situation in which the child care in Japan was surrounded changed greatly. As a result, the caregivers of child care center becomes very busy, and the mind and body's load has increased. Then, it is necessary to think about some help to the caregivers. In some researches, caregivers' stressor is clarified. However, caregivers' stress situation was clarified by using the index to understand caregivers' stress overall in this research. Therefore, the factor to reduce caregivers' stress situation and stress was examined in this research. In addition, the factor to reduce the stress was examined in this research. The result of this research is shown below. The first point is about caregivers' stress. The caregivers don't think that they grow up in working. The second point is about the reduction factor of the caregivers' stress. The social support of the caregivers' in the same center is effective for the caregivers' stress reduction. Years of experience were not effective for the caregivers' stress reduction. There is a very important meaning for these results to think about support to the caregivers. It will be necessary to investigate the inside fact of caregivers' stress in the future. Therefore, it is necessary to do a qualitative investigation. It thinks about the caregivers' support based on the result of them and this researches.