In this study we show that xylan isolated from cassava peel and waste can be used as a raw material for XOS production. Endoxylanase from Bacilus subtillus of soil termite abdomen incubated with the xylan of peel and cassava waste generates XOS in different degrees of polymerization including X1, X3, X4 and specifically X5 as a dominant product. Further research will determine the optimal conditions, which include pH, temperature and time of incubation to obtain the maximum concentration of XOS and will furher elucidate their role as a gastrointestinal health guard.