The relation of parenting variables and attachment classification to peer relations was studied for 156 families with toddler children. Children were observed at 18 months of age in the home with their parents and from 18 to 24 months of age in peer playgroups. Playgroup teachers rated the children's ability to get along with their peers. Also when children were 18 months, they were assessed with their mothers in the Strange Situation, and an attachment classification was made. There were significant differences in peer reactions to children of different attachment classifications. Insecure-resistant children received fewer positive reactions to their positive behaviors, and both resistant and avoidant children received more negative reactions to their positive behaviors. Hierarchical regressions were computed to examine the contribution of observed parent-child interactions and the attachment classification to peer interactions.