This study investigates the relationship between service quality of electronic supermarkets and customer loyalty by conducting questionnaire survey on 237 buyers in Tran Anh electronic supermarkets in Hanoi, Vietnam. This questionnaire was constructed with 28 retail service quality items covering 5 service quality dimensions namely Physical Aspects, Reliability, Personal Interaction, Problem Solving and Policy, and 2 Customer Loyalty items. Statistical analysis results indicate the significant relationship between Customer Loyalty and such dimensions of service quality as Physical Aspects and Problem Solving. From these findings, managerial as well as theoretical implications have been discussed.