The predictive relation between attachment and mother, teacher, and self-reported psychopathology was examined for a diverse socioeconomic status French Canadian sample of 96 children. Attachment classifications were assigned on the basis of reunion behavior with mother when the children were approximately 6 years old, and child problem behavior was assessed 2 years later using the Child Behavior Checklist (mother report), the Social Behavior Questionaire (teacher report), and the Dominic Questionnaire (child self-report). Results indicated that both insecure/ambivalent and insecure/controlling children children were rated higher than secure children on a composite measure of externalizing problems. Concerning internalizing problems, only the controlling group was significantly higher on both a composite adult (teacher and mother) and self-report measure of internalizing problems. Analyses of clinical cutoff scores showed that only the controlling group had a significantly greater likelihood of overall problem behavior than other children.This research was supported by grants from the Social Sciences and Humanities Research Council of Canada and from the Conseil Quebecois pour la Recherche Sociale. We thank Jean Bégin and Elina Alexandrov for their invaluable assistance in the research project.