The purpose of this study was to investigate therapeutic factors and perception of co-leaders' attitudes in elementary children. The Critical Incident Questionnaire was collected from participants during 8 sessions of 3 psychoeducational groups for social anxiety, whereas the Barrett-Lennard Relationship Inventory was administered twice. It was found that affective and behavioral therapeutic factors decreased in the working and ending stages, while cognitive therapeutic factors increased significantly as the groups progressed. Moreover, children were able to form a positive perception of co-leaders' attitudes early on, and perceptions further ameliorated as the groups progressed.