There is provided a microbial culture medium and a microbial culture method for adequately growing a target bacterium contained in an antibacterial test sample. The microbial culture medium for growing a target bacterium contained in an antibacterial test sample is composed of a basal medium for microbial culture, and acid clay or activated clay contained in the basal medium. The microbial culture method for growing a target bacterium contained in an antibacterial test sample using a microbial culture medium includes adding acid clay or activated clay to a solution of the test sample. It is preferred that the acid clay or activated clay be combined with activated carbon.
