The ultimate objective of this study is to empirically elucidate an association among relative quality, customer royalty and relationship marketing between an instructor of Taekwondo studio and trainees as well as their parents in order to provide a fundamental information for establishing the relationship marketing strategies in terms of management efficiency and customer management of a taekwondo studio. The following conclusions were derived from the various analysis mentioned above. First, the relationship marketing between an instructor of Taekwondo studio and trainees as well as their parents had a positive influence on the relative quality. Second, the relationship marketing between an instructor of Taekwondo studio and trainees as well as their parents had a positive influence on the customer royalty. Third, the relative quality between an instructor of Taekwondo studio and trainees as well as their parents had a positive influence on the customer royalty. In summary it is necessary to boost a credibility of the trainees and their parents and to execute various relationship marketing activities for improving the relative quality of a Taekwondo studio, in other words, a feasible marketing strategy for Taekwondo studios should be established not only to offer financial advantages but also to induce positive emotion and pleasant sentiment.