A novel Bifidobacterium bacterium having an opioid peptide degrading action and a non-collagenous glycoprotein degrading action is provided. 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 one or more Bifidobacterium bacteria selected from the group consisting of Bifidobacterium longum subspecies Longum MCC1110 (NITE BP-02430), and the Bifidobacterium bacteria A composition for decomposing opioid peptides and a composition for decomposing non-collagenous glycoproteins, comprising as an active ingredient.