The purpose of the present invention is to provide a better intestine immunomodulator. The intestine immunomodulator of the present invention comprises bacterial cells or a bacterial component of a Lactobacillus paracasei K71 strain having an international deposit No.: FERM BP-11098 as an active ingredient. Preferably, the intestine immunomodulator is used to facilitate production of secretory immunoglobulin A or to activate natural killer cells.本發明之目的在於提供一較佳之腸道免疫調整劑。本發明之腸道免疫調整劑包含國際寄存編號FERM BP-110985、台灣寄存編號BCRC 910529之Lactobacillus paracasei K71之菌體或該菌體成分作為有效成分。本發明之腸道免疫調整劑適合用於促進分泌型免疫球蛋白A的產生，或是用於促進NK細胞之活性化。
