Provided is a gene that is useful for imparting hydrogen peroxide resistance to a microorganism. Also provided is a method for using the same. The hydrogen peroxide resistance-imparting gene encoding a protein selected from the following proteins (a) to (c): (a) a protein having the amino acid sequence of SEQ ID NO: 2； (b) a protein which has an amino acid sequence equivalent to the amino acid sequence of (a), except that one to several amino acid residues are deleted, substituted, or added, and which exhibits hydrogen peroxide resistance-imparting activity； and (c) a protein which has an amino acid sequence having an identity of 85% or higher to the amino acid sequence of (a), and which exhibits hydrogen peroxide resistance-imparting activity.
