Abstract: Background and Objective: Green tea has very strong antioxidant, antibacterial, antiviral, enzyme inhibitory, antiradiation and anticancerous properties. This study aimed to evaluate the efficacy of different levels of green tea extract on reproductive performance, hematology, lipid metabolism and histological structure of liver and kidney of rabbit does. Methodology: Total of 30 mature does and 10 fertile bucks of New Zealand White (NZW) rabbits were divided into 3 groups, 10 in each. The 1st group was control, while second and third groups were given, 1 mL distilled water containing 200 and 400 mg kg–1 b.wt. of green tea extract, respectively, orally for 30 days prior to natural mating. Doe weight at start and end of treatment, mating, kindling and weaning and kid weight at birth and weaning were recorded. Doe litter size and kid viability rate at birth and weaning were calculated. Hematological parameters and lipid profile were determined in blood plasma of does after weaning. Histological structure of liver and kidney of does was examined. Results: Doe body weight was higher in control and second than in third group at end of treatment, mating and kindling (p<0.05) and at weaning (p>0.05). Kindling rate, gestation period and litter size of does and body weight and viability rate of kids did not differ. Hemoglobin concentration, hematocrit, mean corpuscular volume and white blood cells count increased (p<0.05), while platelet count decreased (p<0.05) in third than in control and second groups. Plasma total lipids, total cholesterol, triglycerides and high density lipoprotein concentrations decreased (p<0.05), while low density lipoprotein concentration increased (p<0.05) in second and third than in control group. No pathological legions were noted in the histological structure of liver and kidney. Conclusion: Daily oral administration of rabbit does 30 days prior to mating with green tea extract at levels of 200 or 400 mg kg–1 is recommended to improve reproductive performance and lipid metabolism of rabbit does without adversely effects on hematological parameters and liver and kidney function.