It is the bacterial characteristic composition to which subject of this invention includes one which is selected from the group which consists of Lactobacillus acidophilus PTA-4797, Lactobacillus plantarum PTA-4799, Lactobacillus salivarius PTA-4800, Lactobacillus paracasei PTA-4798, Bifidobacterium bifidum PTA-4801, Bifidobacterium lactis PTA-4802, and Bifidobacterium lactis PTA-5658 stocks at least, possesses immunity modulation characteristic.本発明の主題は、Lactobacillus acidophilus PTA-4797、Lactobacillus plantarum PTA-4799、Lactobacillus salivarius PTA-4800、Lactobacillus paracasei PTA-4798、Bifidobacterium bifidum PTA-4801、Bifidobacterium lactis PTA-4802、及びBifidobacterium lactis PTA-5658からなる群から選択される少なくとも一つの株を含む、免疫変調特性を有する細菌性組成物である。