<;P>;PROBLEM TO BE SOLVED: To provide an agent for improving intestinal flora balance which can be used for various applications such as a food and drink article and a medicine, and to provide a method for producing the same. <;P>;SOLUTION: The agent for improving intestinal flora balance includes lactobacillus-fermented royal jelly obtained by fermenting royal jelly with a lactic acid bacterium. Preferably, at least one selected from Streptococcus, Lactobacillus, and Bifidobacterium is used as the lactic acid bacterium. <;P>;COPYRIGHT: (C)2011,JPO&INPIT