In a cooperative problem-solving setting, Nakayama (1984) found that children's behaviors differed significantly as a function of their motivational orientations (i.e. social and task orientation). The present study examined whether these behaviors could also be observed in their interactions with peers. Children in four elementary -school samples (total N = 674) were classified into four groups according to relative strength of social and task orientation. In order to tap various aspects of their peer interactions, subjects were given some questionnaires to complete. Socially oriented groups had many friends and shared various experiences with them. Moreover, the two socially oriented groups showed different interactions, though. HL group (social orientation being dominant) was frequently selected as friend by their classmates while sharing intimate and confidential experiences. On the other hand, HH group (both orientations being high) was active to form new friendships, and reported somewhat instrumental relations. These results, along with other findings on less socially oriented groups, paralleled to those found in a previous study (Nakayama, 1984), suggested that children's motivational orientations had a consistent influence in such settings.