This study was conducted to explore the mediating effects of social support on the relationship between career decision making level and parent-child relationship based on the analysis of structural modeling. 389 survey conducted on college students. According to the analysis, the relationship among parent-child relationships, career decision level, and social support perceived by the university students showed significant results. Father-child relationship affected on the social support and the career decision level. Mother-child relationship affected on the social relationship only. Also, the mediated effect of social support was identified on the relationship between parent-child and career decision level. Based on the results, parent-child positive relationship efforts to enhance career decision level of college students, intervention strategies in terms of social support were discussed.