This is the first research on the relationships among satisfaction, trust, and commitment that compare the chain store and the traditional convenience store in Taiwan. The population of this research is the chain store and the traditional convenience store in south Taiwan. This research adopts the purposive sampling method to sample and acquires 401 valid questionnaires by personal interviews. The results of the structural equation model analysis indicate that the proposed model is valid and has a highly explaining power for the trust construct and the commitment construct. The results show that there is a positive relationship that is significant and direct between satisfaction and trust, trust and commitment. Finally, some suggestions are offered for the suppliers.