Purpose of the study. The purpose of the study was to compare the effect of spinal and general anesthesia on the incidence of postoperative complications aſter hernioplasty and on the dynamics of the frailty index (FI) in elderly patients with inguinal hernia.Patients and methods. 78 patients diagnosed with inguinal hernia were involved in the study (average age was 70.1 ± 0.8 years). Patients underwent open hernia repair and Lichtenstein plasty of the posterior wall of the inguinal canal. The patients were divided into two groups depending on the type of anesthesia: spinal anesthesia (SA; N = 65) and general anesthesia (GA; N = 13). At the time of admission, 30 days aſter the surgery, the FI was calculated using the Edmonton questionnaire.Results. In the SA group, 39 patients (60 %) had a FI ≥ 7; 9 patients (13.8 %) had a FI ≥ 9; 8 patients (12.3 %) had a FI ≥ 11; and 9 patients (13.8 %) had the highest FI ≥ 12. At 30 days aſter surgery, 20 patients (30.8 %) showed a decrease in FI values (FI from 7 to 9 decreased almost 2-fold). In the GA group, on the day of admission, 6 patients (46.2 %) had FI ≥ 7, 5 (38.5 %) had FI ≥ 9, and 2 (15.4 %) had FI ≥ 11. At 30 days aſter surgery, no changes were observed in patients with FI ≥ 7.Conclusion. In the spinal anesthesia group, urinary retention was predominant among complications, while in patients aſter general anesthesia, pulmonary atelectasis prevailed among complications. The use of spinal anesthesia for hernioplasty was accompanied by a decrease in the frailty index within 30 days aſter surgery in individuals with a FI ≥ 7. In the GA group, decrease in the index within 30 days aſter surgery was observed in patients with FI ≥ 9.