The purpose of this research was to demonstrate practically a mediating effect of professional team trust between preference of professional sport on-the-spot events and spectator’s re-visiting intention. Since trust is regarded as a key factor establishing corporate’s going-concern and growth momentum in all the business environment, it is required to verify that team trust can significantly mediate preference of on-the-spot events offered by teams and re-visiting intention. To do this research, 246 questionnaires were distributed to domestic professional basketball competition spectators who live in Seoul Metropolitan area and Gangwon Province in Korea. Convenient sampling method was utilized. To attain the proper result, exploratory factor analysis(EFA), reliability, correlation and path analysis were introduced. Additionally, bootstrapping method was adopted to test the mediating effect of team trust using SPSS 15.0 version and Amos 7.0. The results are as follows. First, preference of professional sport on-the-spot events statistically influenced on professional team trust and re-visiting intention concurrently. Second, professional team trust significantly influenced on re-visiting intention. After conducting the mediating effect test on the basis of research model, it was found that trust can play a mediating role between preference of on-the-spot events and re-visiting intention.