The purpose of this study as to explore relationships between preschooler`s aggression and social skills, maternal management strategies of peer relations and parenting behaviors and preschoolers` internet-game addictive inclination. Participants included seventy-seven (77) 5 to 6-year-old preschoolers (44 boys, 33 girls) and their mothers. The Aggressive Behavior Scale (Lee & choi, 2001), the Social Skill Rating Scale (Suh, 2004), the Maternal Parenting Behaviors Scale (Rhu &Lee, 2007) and the Parental Involvement Checklist (Park, 2001) were used in this study. The Interne Game Addiction Scale (Korea Agency for Digital Opportunity and Promotion, 2006) was used to identify higher and lower addictive level of interne game inclination. Collected data were analyzed by descriptive statistics and t-test. Major findings revealed that preschooler`s social skills, maternal management strategies of peer relations and parenting behaviors showed a predictable correlation to preschooler`s internet←game addictive inclination.