The purpose of this study was to examine the necessity of parent education of group counseling type geared toward boosting professional-ism and the effects of parent education based on the theory of transactional analysis on the positive change of emotional expression useful for parent-child communication. It s basically meant to suggest some of the right directions for the content and method of parent education. A program was conducted in 11 sessions, and a survey was conducted before and after the program respectively to assess the maternal efficacy and emotional display of the selected mothers. The findings of the study were as follows: First, there was no change among the mothers in maternal efficacy after their participation in the parent education program. Second, as for emotional display, positive expressions were on the increase after they engaged in the activities of 11 sessions, and there was a decrease in strong negative expressions. But no change was found in weak negative expressions. Third, concerning maternal efficacy, there were more positive changes in strong affirmation, weak affirmation and weak negation when their parental efficacy became better. But that had no correlation with the change of strong negation.