Attachment theory proposes that early parent-child relationships provide the basis for all future close relationships of the individual, through childhood and adolescence into later life. The purpose of the present study was to examine the relationship between parental attachment, peer attachment and students' perceptions of their teacher's interpersonal behaviour, in order to shed light on the channels through which these constructs relate. In doing so, we examined three proposed theoretical schemes of pre-adolescents' representations of multiple relationships. As a side-goal, the psychometric properties of the Greek translations of the Revised Inventory of Parental and Peer Attachment (IPPA-R) and the Questionnaire on Teacher Interaction (QTI-G) were investigated. Two independent samples comprising 270 and 306 pre-adolescents (grades 5-7), respectively participated in the study. Results supported a four-factor structure of the IPPA-R and an elliptical shape for the Interpersonal Teacher Circle measured by the QTI-G. The integrative scheme regarding pre-adolescents' multiple adult relationships was supported by the data. Parental attachment relationships were found to be an important determinant of students' perceptions of their teacher interpersonal behaviour, which in turn mediated the relationship between parental and peer attachment relationships. Results are discussed in terms of their theoretical and practical implications.