Purpose: To classify the frailty subgroups by employing the Tilburg Frailty Indicator (TFI), as well as exploring the differences in postoperative total complications, length of stay (LOS), disability, and quality of life (QOL) between each subgroup among preoperative elderly gastric cancer patients.Methods: Overall 290 patients were enrolled in this follow-up study. The TFI was used to collect the information of physical, psychological, and social frailty. The data of total complications and LOS were provided from the electronic medical records, while the data of disability and QOL were obtained from the telephone at 30 days after discharge.Results: The TFI divided the preoperative elderly gastric cancer patients into eight frailty subgroups: exclusive physical frailty (18.3%), exclusive psychological frailty (20%), exclusive social frailty (3.4%), physical and psychological frailty (14.5%), physical and social frailty (3.4%), psychological and social frailty (3.4%), multidimensional frailty (4.8%) and full robust subgroup (32%). The multidimensional frailty subgroup had worse outcomes in total complications (P=0.001) and LOS (P<0.001) while the subgroup of physical and social frailty had poorer QOL (P=0.015) at 30 days after discharge. Conclusion: The multidimensional frailty subgroup and the physical and social frailty subgroup should be of particularly concerned in the hospital and outside hospital according to our study. It also indicates that prehabilitation strategies can be developed precisely based on reported items to improve functional status of elderly gastric cancer patients. Further studies are needed to conduct in a longer-term period to capture significant change of other outcome indicators.