The purpose of this study was to analyze the structural relationships among resilience, psychological acceptance, deliberate rumination, and posttraumatic growth in adolescence. For this purpose, a survey regarding trauma was conducted in middle and high school students residing in Gyeonggi Province. This study obtained the following results: First, resilience was statistically significantly positively correlated with psychological acceptance, deliberate rumination, and posttraumatic growth. Psychological acceptance was statistically significantly negatively correlated with deliberate rumination and was statistically significantly positively correlated with posttraumatic growth. Deliberate rumination was statistically significantly positively correlated with posttraumatic growth. Second, resilience affected posttraumatic growth through the medium of deliberate rumination. This study is significant in that: first, it has provided empirical data as to the factors for posttraumatic growth of school-aged adolescents, such as middle and high school students, while little research on posttraumatic growth has covered middle school students in South Korea; second, it has analyzed the structural relationships between resilience and deliberate rumination and psychological acceptance in terms of the factors for posttraumatic growth in adolescence and made suggestions for counseling and psychological treatment while little research has been conducted on resilience and psychological acceptance.