When the customers do more interactions in group-buying, they will more likely reach the group flow state. Furthermore, their satisfaction can be increased. To understand the influence of group flow on individual’s satisfaction and re-purchase intention in group-buying, this study developed the research model based on group flow theory and expectation confirmation theory. A survey was conducted and questionnaires were distributed to group-buying customers. Two hundred and fifteen usable responses were collected. Structural equation modeling was used to analyze the data. The results indicated customer confirmation and group flow positively affect satisfaction and further positively affect re-purchase intention. Perceived performance is affected by expectation and group flow, and further affects confirmation. Finally, academic and managerial implications from the findings are also provided.