The purpose of this study First, investigates the formation mechanism of loyalty to a tourist destination that reflects attachment to a tourist destination and switching costs. Second, it also examines what factors cause attachment to a tourist destination and switching costs to increase. Third, we would like to suggest specific marketing plans to increase loyalty to tourist destinations. According to the results of this study The hypothesized model, including the factors forming tourist destination attachment and switching costs, showed a high degree of fit with the survey data, and the assumed causal relationship was generally confirmable. Specifically, it was confirmed that attachment to a tourist destination and switching costs have a positive effect on loyalty to a tourist destination. In addition, attachment to a tourist destination is determined by evaluation of tourist resources, evaluation of accumulated experience, evaluation of novelty, and evaluation of interpersonal hospitality benefits. It was also revealed that the conversion cost is determined by the evaluation of novelty and the evaluation of interpersonal convenience.