Abstract : The aim of this study is to know if some aspects of social and school adjustment of 3 to 5 year old children are specifically linked with attachment to mother and more particularly with attachment to father. In this way, specific attachment representations to mother and to father of 138 children were explored with a french adaptation of the Attachment Story Completion Task (Miljkovitch & al., 2003), peer intercations were observed during free play sessions at school, behaviour problems were evaluated with a french adaptation of the Child Behavior Check List (Fombonne, 1988) filled out by mothers and chilren's school adjustment was evaluated with a teacher questionnaire (Florin, Guimard & Nocus, 2002). Results show that wether some aspects of social and school adjustment are specifically linked with attachment to mother and to father, some others seem to be simultaneously linked with attachment to both parents. Finally, whereas very strong links between quality of attachment relations and representations to both parents were found, taken together our results suggest that children develop independent relationships and specific attachment representations to mother and to father. Moreover, these results lead us to reconsider the way to evaluate quality of attachment relationships and to explore children's specific attachment representations.