This article investigated that influence of the relationship among relational benefits, trust, and loyalty about travel agencies' one-person-enterprise. Because the activation policy is underway that government should support one-person-enterprise. To research, survey was conducted by people who have plan travel to buy through travel agency and 355 respondents answered. 315 copies of questionnaire among them are effective for analysis after excluding the insincere answers. The collected data was analyzed by reliability, factor analysis, correlations and the structural equation using SPSS 21.0 and AMOS 21.0. As the results of analysis, confidence benefits and special treatments effect in trust in one-person-enterprise. But social benefits have an effect on trust. And confidence benefits and special treatments effect in loyalty in one-person-enterprise. But social benefits have an effect on loyalty. Trust effect in loyalty. Trust plays a mediated effect between relationship confidence benefits and the loyalty.