This paper reports the findings of a longitudinal childhood resilience study which investigated the relationship between resilience-related beliefs and positive child development. Three waves of data collection (T1, T2, and T3) were completed in January 2005, July 2005, and January 2006 with a sample of 843 grade 4 pupils, drawn from six primary schools in Hong Kong, and their parents or guardians. At T1, parents/guardians responded to a 24-item inventory of life adversities affecting their children since birth; at T1 and T3, they completed a 25-item "Parental Assessment of Child's Habit," which provided parental evaluation of children's performance at home and in school. At T1, T2, and T3, children responded to a 58-item "Child and Youth Resilience Measure," a 9-item scale on "Chinese cultural beliefs about adversity," and an 11-item Chinese "Resilience Measure for Children and Adolescents in Hong Kong." Regression analyses, based on linear mixed models, controlling for gender, T1 and T2 scores, personal variables, and random effects of schools, were conducted to test and validate the hypothesis that children's resilience beliefs are predictive of positive child development, and that this predictive relationship is stronger with increasing adversity in children's lives. Implications of these findings for the development of resilience-based interventions to enhance the quality of life of children facing adversities are examined.