Abstract: An experiment was conducted to determine the effects of several levels of Neurospora crassa-fermented palm kernel cake in the diet on the production performance of Gold Arab laying-hens and to obtain the appropriate level of this fermented palm kernel cake for reducing the utilization of concentrated feed in the diet. Three hundred Gold Arab laying-hens of 72 weeks old were employed in this experiment and randomly assigned to four treatments (0, 7.25, 10.15 and 13.05% fermented palm kernel cake in diets) in a completely randomized design with five replicates. The measured variable was production performance (feed consumption, egg-mass production, feed conversion, egg weight and hen-day egg production). Results of experiment indicated that feed consumption, egg-mass production, feed conversion, egg weight and hen-day egg production were not influenced (p>0.05) by diets. In conclusion, Neurospora crassa-fermented palm kernel cake could be included up to 13.05% to effectively replace 45% concentrated feed in the diet of Gold Arab laying-hens without adverse effect on the production performance.