Novel Bifidobacterium bacteria having an opioid peptide decomposition action and a noncollagenous glycoprotein decomposition action are provided. The present invention relates to one or more kinds of Bifidobacterium bacteria selected from the group consisting of Bifidobacterium bifidum MCC1092 (NITE BP-02429), Bifidobacterium bifidum MCC1319 (NITE BP-02431), Bifidobacterium bifidum MCC1868 (NITE BP-02432), Bifidobacterium bifidum MCC1870 (NITE BP-02433), and Bifidobacterium longum subsp. longum MCC1110 (NITE BP-02430), as well as a composition for decomposing an opioid peptide and composition for decomposing a noncollagenous glycoprotein containing the Bifidobacterium bacteria as an active ingredient.
