In the present study; the experimental defects were created in the rabbits at the urinary bladder and the repair of the defects with autogenous Fascia latae (FL) graft was provided. The aim was to evaluate whether the graf-ted urinary bladder capacity reached to the normal urinary bladder capacity. A total of 32, healthy male adultNew Zea-land rabbits were used in this study. The rabbits were randomly divided into four equal groups, i.e. Group I, II, III and IV (control) according to the duration of euthanasia. Bladder capacities of the rabbits were measured preoperatively. Experimentally 2x2 cm defects were induced in the urinary bladder of the rabbits and repaired with autogenous FL graft in the firt three groups. The rabbits in the Control Group underwent no surgical application. Postoperative bladder ca-pacities of rabbits in the groups were measured at the end of 4th (Group I), 8th (Group II) and 12th (Group III and IV), weeks before being euthanized. The urinary bladder capacities of Control Group were compared with those of the rab-bits in the other groups. As a result, it was concluded that the autogenous Fascia latae graft might be used successfully in the urinary bladder with decreased capacity.