An object of the present invention is to provide a method of identifying metallo-β-lactamase-producing bacteria, particularly, a method of conveniently identifying an IMP or VIM type. According to the present invention, there is provided a method of detecting metallo-β-lactamase-producing bacteria, comprising spotting a compound (I) onto a surface of a solid medium coated with the bacteria to be tested, spotting 3 types of β-lactam agents at 3 respective positions different from the spot of the compound (I), culturing the solid medium, and then detecting the metallo-β-lactamase-producing bacteria based on the shape of an inhibition zone formed around the spot of each of the β-lactam agents. There is further provided a method of identifying an IMP or VIM type of the metallo-β-lactamase-producing bacteria.