A recombinant microorganism having poly-γ-glutamic acid-producing ability, prepared by introducing a Bacillus subtilis pgsB gene or a gene functionally equivalent thereto, and a Bacillus subtilis pgsC gene or a gene functionally equivalent thereto, among a group of genes relating to synthesis of poly-γ-glutamic acid, into a host microorganism, in which no Bacillus subtilis pgsA gene or a gene functionally equivalent thereto is being introduced into the host microorganism; and a method of producing poly-γ-glutamic acid employing the recombinant microorganism.