The aim of this paper is to reveal how collaborative learning works in a local child rearing support center, using Rogoff’s three concepts: guided participation, apprenticeship and participatory appropriation. These concepts reflect different planes of focus in sociocultural activities - interpersonal, community/institutional and personal. Case analyses, questionnaires to parents and interviews with center staff show: 1) Parents decrease their worries about child rearing and learn about education and care style which relate to culture in Japan by participate in the center's activities; 2) Center staff learn new information and style about child rearing from young mothers suffer mental conflict. However, center staff try to understand the mothers' situation while being conflicted. Collaborative learning of this type allows for the possibility of change within the child rearing community and within the concepts of support.