T HE PRESENT study was carried out to evaluate the effect of feeding fermented wheat bran (WB) on the broiler performance. Nutritional value of wheat bran was improved through fermentation by cellulase secreting fungi isolated from soil. A total number of 90 one-day-old chicks were randomly assigned into 3 experimental groups (30 each, in 3 replicates). Group 1: diet including 0 % wheat bran (control1), Group 2: diet including 10% unfermented wheat bran (control 2), Group 3: diet including 10% wheat bran solid fermented by Trichoderma longibrachiatum (SF1). All diets were iso-caloric and iso-nitrogenous. Feed and water were provided ad libitum. The statistical evaluation of growth performance at the 5 th week of age indicated significant increase in the average live body weight of birds fed with fermented wheat bran which recorded (1640 g) compared with the control-1 (1147.7g) and control-2 (1363.5 g). Feed consumption recorded significant increase to 3915.6 g/ bird, which returned to the best palatability of fermented feed. It was clearly sustained that the best significant feed conversion was recorded in group treated with fermented wheat bran (2.39), while unfermented WB group (2.41) compared to control-1(2.69). The cross sections in duodenum revealed no histopathological features related to such fungi and showing normal histological structure. Concerning the effects of feeding fermented wheat bran on some blood parameters , results showed that most levels are in normal ranges. In conclusion, wheat bran solid fermented by Trichoderma longibrachiatum (SF1) could be successfully used in poultry feed without deleterious effect. Hill et al., 1960). Furthermore, it contains 43.6 % insoluble dietary fibers, 2.5% soluble dietary fibers, 6.7% ash and various essential amino acids for the enzyme production and bacterial growth (Sievert et al., 1990). It may contain up to 12% crude fiber and insertion in the broiler diet usually does not exceed 5% due to its high fiber content (NRC, 1994), which limits its utilization in poultry feed due to ineffective fiber fermentation in gastrointestinal tract. Assessment of TheFermentation process is treatment method besides as optimal food/feed storage could increase nutrient content. Winarno and Fardiaz (1982) found that fermented feed containing higher nutrient compared to a raw material. Chiang et al. (2010) reported that solid state fermentation improved nutrient digestibility, increased the numbers of lactobacilli in the colon and ceca, enhanced the small intestinal structure of the broilers and potentially reducing the cost of broiler production.Filamentous fungi like Trichoderma spp. are well known efficient producers of cellulases (Peij et al., 1998 (Cherry and Fidantsef, 2003). Filamentous fungi have a greater penetrating power into insoluble substrates and are therefore, more suitable for solid-state fermentation of lignocellulosic materials (Kang et al., 2004). At the present, the various strains of Trichoderma spp. are recognized by the researchers as the steadiest an...