This study was performed to investigate the influcence of various dietary fiber sources in Korea for activities of bacterial enzymes (${eta}$-glucosidase, ${eta}$-glucuronidase) and amounts of putrefactive product (indole) in aged rats. ${eta}$-Glucosidase activity in the intestinal content was significantly lower in the seamustard 15% group than in other groups whereas the activity of ${eta}$-glucuronidase was higher in the mugwort 15% group than other experimental groups. The amount of indole and pH in the intestinal content of aged rats were significantly lower in mugwort groups than in other groups.