The aims of this study were to investigate the relational dimension within the healthcare work, focusing on interpersonal relations developed in a family health teamwork; to analyze the interactional dynamics in establishing social roles for the participants of the family health and the managers who support teamwork through mapping interpretative repertoire; to identify social practices-mechanisms and language in use-which contribute to social interactions/interpersonal relations in teamwork. It is an explorative qualitative study. Theoretically and methodologically, this research is based on social construcionism. The study was carried out in two Health Units in Belo Horizonte City in two periods: October 2009 to February 2010 and May 2010 to August 2010. Data was collected through observation and semi-structured interviews. Twenty-eight integrative activities of four family health teamworks (who met the criteria of the study were observed. Thirty-two collaborators were interviewed: two health unit managers, four nurses, three physicians, five nurse technicians and eighteen community health agents. Data showed the general characteristics of the collaborators who provided us a better understanding of the relational processes developed within family health teamwork settings. Speech analysis based on a construcionist approach allowed us to identify six interpretative repertoires:: (a) meeting place: the local where social diversity meet ; (b) Users share: a clash of points of view; (c) teamwork: "It ain´t so easy to do; (d) Interpersonal relations and the gap between the Organization (or Institution) and the workers; (e) The managers and the participants of the family health teamworks: the living space; (f) Magic mirror: "mirror ,mirror on the wall" The use of repertoires allowed us to justify and legitimate interpersonal relation practices within family health teamwork settings. However, there was a predominance in individualist responsibility character traits observed from social contexts and not present in the work settings, which is responsibility-free. The performance of social roles, for the interaction with others in building projects in common on a daily basis in a family health teamwork setting, are individually experienced. Nevertheless, we (strongly) believe them to be important and new relational practices in health-care work, especially teamwork.