The purpose of this study is to investigate the mediating effect of social support on the relationship between parenting attitudes and adaptation to college life perceived by college students. To this end, a study was conducted on four-year college students in Busan. The survey period was about 1 month, and a total of 269 parts of the collected questionnaire excluding non-response and negative answers were used for final research and analysis. To test the hypothesis, the basic statistical and correlation analysis of each variable is as follows. It was done with the SPSS 25.0 statistical program. In order to evaluate the indirect effect of this study, a bootstrapping technique was applied. The summary of the results of this study is as follows. First, there were significant correlations among parents' parenting attitudes, college life adaptation, social support and their subscales perceived by college students. Second, a regression analysis was conducted to find out whether the parenting attitude and social support perceived by college students influence the adaptation to college life. Third, regression analysis and bootstrapping were conducted to prove whether the mediating effect of social support in the effect of parental attitudes of college students on adaptation to college life. There was a partial mediating effect of social support. In light of these results, the following conclusions can be drawn. Parents' parenting attitudes and social support perceived by college students are important requirements for college students to adapt well to school life, adapt well to society, and become a member of a healthy society. In addition, if parents practice affectionate and appropriate parenting attitudes to their children, they recognize that their children receive sufficient social support and, as a result, can help them adapt well to social environments such as college life. Therefore, it is suggested that in order to enhance the adaptability of college students to school life, it is necessary to develop a counseling program and to receive adequate parenting attitude and sufficient social support from parents.