Background: Liver regeneration for donors' graft in living donor liver transplantation (LDLT), is an example of liver regeneration in normal liver. In this study we spotted the light on liver regeneration in donors after LDLT, focusing on factors affecting it. Aim: To study the impact of different factors on liver regeneration in donors of living donor liver transplantation. Patients and methods: Between May 2009 and June 2013, 80 living donor liver transplants were performed in the liver transplant unit in EL-Maadi Armed Forces Hospital. All donors who provided liver grafts underwent volumetric spiral computed tomography (CT) scans preoperatively and postoperatively at time intervals of 1week and 1,3 and 6 months. Patients' demographics, surgical data, and postoperative outcomes were correlated with liver regeneration data. 63patients were males and 17 patients were females, with mean age 27.97yrs ±5.3. They provided {72} right lobe (RL) grafts and 8 right posterior sector (RP) grafts. Results: No donor operation was aborted and surgical morbidity rate was {33.75%}, mostly biliary. All RP donors achieved complete liver regeneration after 3 months; only four RL donors achieved complete liver regeneration at 6 months. Conclusion: In this study, it was found that there were factors affecting regeneration like age, gender of the patient and graft size. But no effect was found with many factors as peri- operative liver function tests, steatosis, BMI, operative time, blood loss, blood transfusion and postoperative complications.