본 연구는 성인의 대인외상경험과 외상 후 성장의 관계에서 낙관성과 관계의 질의 다중매개효과를검증하기위해 실시되었다. 이를 위해 30세 이상 60세미만의 성인을 대상으로 임의표집방법에 의해 조사를 실시하였다. 주요 분석방법으로는 구조방정식모델(SEM) 분석을 AMOS프로그램을 사용해 실시하였다. 매개효과 검증을 위해서 Bootstrap 방법을 사용 하였고, 다중매개효과의 간접효과 검증을 위해서는 팬텀변수(Phantom Variable)를 사용해 모형을 변형한 후 분석하였다. 연구결과, 대인외상경험수준이 높을수록 외상 후 성장도 높게 나타났다. 둘째, 대인외상경험과 외상후 성장 사이에서 낙관성과 관계의 질이 각각 부분매개하는 것으로 나타났다. 셋째, 대인외상경험과 외상 후 성장 사이에서 낙관성과 관계의 질이 이중매개하는 것으로 나타났다. 연구결과를 토대로 실천현장에서의 실천적 전략과사회복지에의 함의를 제시하였다. This study is to research the mediating effects of optimism and quality ofrelationship which interpersonal traumatic experience influences posttraumaticgrowth. It focuss on verifying the impact of interpersonal traumatic experience tooptimism and quality of relationship and the influence of optimism and qualityof relationship to posttraumatic growth. And also it is to verify dual mediatingeffect between optimism and quality of relationship. Data for this study were collected through the use of a survey instrumentcompleted by 405 interpersonal traumatic experience, 30-60 age group. Collecteddata were analysed by AMOS program, Structure Equation Model(SEM) wasimplemented to verify the mediating effect between optimism and quality ofrelationship. Finally, Phantom Variable was utilized for verification of indirectinfluence of a multi mediating effects. The findings of this study were as follows, First, the result shows that thehigher level interpersonal traumatic experience, the higher posttraumatic growththey have. Second, it shows that optimism and quality of relationship havepartial mediating effect between interpersonal traumatic experience andposttraumatic growth. Third, it was analyzed that optimism and quality ofrelationship had double mediating effect. Based on these findings, the researchdiscussion reinforced the importance of intervene with its optimism and qualityof relationship in the site of those who experience interpersonal trauma. Theological, political and practical implications of this study are as follows. First, it has a series of significance in terms of that this study confirmed itsinfluence considering the quality of relationship from interpersonal experienceamong relevant factors of traumatic accident, optimism among individual factors,quality of relationship among environmental factors based on 'the crisis of lifeand the theory of individual growth'. econd, even though optimism and quality of relationship were proved as major predictors for posttraumatic growth of thosewho experience interpersonal traumatic, psychological support center fortraumatic experience is not operated systematically in Korea. Third, this studyimplies that it should intervene mainly with its optimism and quality ofrelationship in the site of those who experience interpersonal trauma such as anyabuses including sexual abuse, bullying, and divorce.