Objectives: This study aimed to investigate the effect of adolescent attachment trauma experience in adolescence on the drinking behavior in adults. Methods: This study analyzed 293 men and women aged 20-49 with experience in attachment trauma were used in the survey. Collected data were analyzed by frequency, t-test, moderated multiple regression and simple slope analysis by SPSS 21.0. Results: First, the difference in gender was found in the experience of attachment trauma and drinking behavior. Men are more experienced in attachment trauma than women and men are more likely to drink alcohol. Second, the higher the level of childhood attachment trauma, the higher the level of drinking behavior. Conclusion: With this results, the study provides information for intervention, implications and the limitation and also discuss the clinical implications of the relationship between attachment trauma and drinking behavior as a specialized approach for this condition.