Abstract: The objective of this study was to evaluate the effects of chicory (Cichorium intybus) and Jerusalem artichoke (Helianthus tuberosus L.) on feed intake, digestibility, nitrogen retention and rumen fermentation of sheep fed with pangola (Digitaria eriantha) hay and pelleted concentrate. Four growing sheep between 2-3 years of age and pre-trial average body weight of 32.4±5.5 kg in a 4×4 Latin square design. The four concentrate treatments were control (T1), control plus 2% Chicory in concentrate (T2), control plus 2% Jerusalem artichoke (T3) and 4% Jerusalem artichoke (T4) in concentrate. The results showed that the addition of chicory and Jerusalem artichoke powder. There were no significant effects on the addition of chicory and Jerusalem artichoke powder of on feed intake and dry matter and organic matter and digestibility. Acid detergent fiber digestibility of sheep fed with chicory or Jerusalem artichoke was decreased (p<0.05) compared with the control diet. However, crude protein digestibility of sheep fed with chicory and Jerusalem artichoke were significantly higher (p<0.05) than that sheep fed with the control diet. Nitrogen (N) intake, urinary N, N absorption and N retention were not significantly different statistically (p>0.05) among treatments. The average ruminal pH values were ranged between 6.88-7.56 and were neither affected by sources of inulin are chicory and Jerusalem artichoke. Ruminal NH₃-N, Blood Urea Nitrogen (BUN ruminal bacteria and population of all dietary treatments were not significantly different statistically (p>0.05). Nitrogen retention of sheep fed with chicory and Jerusalem artichoke were significantly higher (p<0.05) than that sheep fed with the control diet. These results indicated that inulin from chicory and Jerusalem artichoke has the potential to improve nitrogen utilization.