Abstract: The comparative nutritional performance study of two varieties of faba beans (Vicia faba L.), Kalimatar and white faba bean was carried out in young rats (Rattus norvegicus) fed ad libitum on 10% protein source for 21 days. Effect of faba bean diets on faecal moisture content, intestinal length and dry weight of different organs of rats (g/100 g) were studied. The dry weight of liver of rats of experimental groups decreased and that of pancreas, colon and small intestine increased as compared to control group. Intestinal length and faecal moisture content of rats fed on locally grown faba bean were the highest among all groups under tested while the moisture content of faeces of rats fed on exotic faba bean diet was the lowest. The study also revealed a differential nutritional response of rats to two varieties of faba beans and is apparent that locally grown Kalimatar is nutritionally better than exotic white faba bean.