This study investigated the heterogeneity of mutual antipathy relationships. Separate cluster analyses of peer interactions of early adolescents (mean age 11 years) and adolescents (mean age of 14) yielded 3 "types of individuals" in each age group, namely Prosocial, Antisocial, and Withdrawn. Prevalence analysis of the 6 possible combinations of types of individuals constituting mutual antipathy dyads yielded "antipathy dyad types." The majority of these dyads consisted of a combination of 2 dissimilar types of individuals. Implications of the high prevalence of the Antisocial-Withdrawn antipathy dyad type are discussed.