The aim of this study was to examine positive and negative qualities in adolescents' interpersonal relationships and their relative importance in predicting emotional distress. Participants were 260 students from three schools in the Dublin area (119 girls; 141 boys), aged 12-18 years (M = 15.32, SD = 1.91). Students completed questionnaires assessing qualities in important interpersonal relationships in their lives and emotional distress. Girls reported more positive qualities in their relationships with mothers and best friends than boys. Younger students reported more positive qualities in their relationships with parents than older students. Stepwise multiple regression analysis revealed high levels of satisfaction in interpersonal relationships were predictive of low levels of emotional distress whereas high levels of criticism and exclusion were predictive of high levels of distress. High levels of support and disclosure were also linked to emotional distress. These findings and their implications are discussed in detail. (Contains 3 tables.)