The main purpose of this study is to investigate the influence of the relationship marketing effects on transaction intention of travel agency in Thailand not only perceived value , trust, attitude toward travel agency are also effects on transaction intention and the moderating effect of word-of-mouth between the influences of trust, attitude toward travel agency, perceived value on transaction intention. In Thailand expand very fast and market continued growing and the consumer has more chance to purchase the travel agency and the distribution channels has been developing, people can access to the product very easily. In this covered with consumers who have been using travel agencies with domestic and outbound. Convenience sampling was adopted for conducting the survey questionnaire. Online questionnaire was used to collect the primary data. Finally there are some moderating variable including word-of-mouth supported enhance the success of transaction intention. This moderating variable predicted the influence of trust, attitude toward travel agency, perceived value on transaction intention. Since previous studies regarding that the relationship marketing effects on perceived value, trust there are the limited, the result of this study provided as an important reference for future academic validations and also provided a base line for travel agency manager for developing the method to attract the consumer in the future.