The purpose of this paper is to provide an explanation of factors influencing online group buying of Taiwanese adopter of online group buying, which can help the practitioners of Taiwan to develop better market strategies. An empirical survey was used to test the hypotheses. Data were collected from a total of 202 online Taiwanese adopters of OGB (online group buying). A structural equation modeling (SEM) is proposed to assess the relationships of the research model. The findings in this paper show that the virtual community and attitude toward online group buying are significant factors in predicting the purchaser intention of buying together in Taiwan. Also, the Trust in VC and usefulness are significant to improve the attitude. The results in the paper facilitate to understand what encourages and impedes the purchase intention of adopters of OGB in Taiwan. The value of this paper is to establish a theoretical model incorporating an extension of trust and TAM model with TPB to investigate the purchase behavior of OGB in Taiwan. The results of this study help OGB practitioners of Taiwan and other Asian countries culture similar to Taiwan to create a success business model