Objectives: The purpose of this study was to examine the association between oral health-related quality of life and adult attachment type among college students. Methods: A total of 557 self-administered questionnaires were collected from undergraduates in Jeonbuk. Data were analyzed using SPSS 22.0. The results were analyzed using t-tests, analyses of variance, Duncan’s multiple range tests, correlation analyses, and multiple regression analyses. Results: The results of this study showed that sex and age were significant factors according to the analysis of the oral health-related quality of life in terms of general characteristics. The variable that had the greatest effect on the oral health-related quality of life was attachment anxiety, followed by age, sex, and attachment avoidance. Conclusions: Education and counseling to promote safety of adult attachment will improve the oral health-related quality of life for college students.