The present research aims at studying the construction of discursive and social identities regarding the interrelated speech produced by a family from Brasília. The goals intended to be attained consist at showing: the way each person / participant, playing their interrelated role, produce interrelated speech; how identities are built in the relationship between the self and the other; how personal and group identities are uttered in the family context. The theoretical support resides between the Interrelated Sociolinguistics and an interrelated sociocultural conception on discursive and social identities. The methodology is the ethnographic microanalysis of qualitative and interpretative nature, and based upon linguistics analysis of face-to-face written out interactions, as well as in research interviews. The analysis focuses; the interactional conflict that is established between father and daughter in interactional events; the family members personal identities that are built in the relationship with each other; the family identities considered as a social group. The results indicate that the participants use means which change the family’s frame and footing, creating and keeping hierarchy and solidarity relationships on a co-construction of their identities. From the viewpoint of relationships, the building of a family regarded as a social group appears to be changing, though people still maintain conservative values. The present paper proposes data and results, so that one can think upon the family’s interactions, helping to compensate the construction of social and discursive identities, mainly the ones involved in the relationships of conflict and negotiations, which are part of families in process of changes.