This study examines the influence of parental social support and resiliency of efficacy on stress, depression and stress management behavior. A total of 799 participants (male=386, female=413), consisting of 184 elementary school, 354 middle school, 274 university students completed a questionnaire that included Rhode Island Stress Scale (Horiuchi, Tsuda, Tanaka, Yajima & Tsuda, in press), Stress Management Behavior Scale (Evers, Prochaska, Johnson, Mauriello, Padula & Prochaska, 2006), Becks' Depression Inventory (BDI-II, Beck, Steer & Brown, 1996; CES-D, Radloff, 1977), Resiliency of Efficacy (Bandura, 1995), and Parental Social Support (Kim & Park, 1999). The results of path analysis are as follows. First, resiliency of Efficacy had a direct and negative effect on stress and depression and direct positive effect on stress management. Second, stress management behavior did not have any influence on stress. Third, parental social support had a direct and positive effect on resiliency of efficacy. This pattern of results were found for elementary school, middle school and university students. When depression was measured by CES-D Scale (Center for Epidemiological Study of Depression) parental social support and resiliency of efficacy had a different parental of influence on stress, depression and stress management behavior, pointing out the importance of conducting comparative analysis of various measures of depression.