The present invention provide an antibacterial method and a deodorizing method that have excellent safety and obtains desired result in a corner of a target space, and a microorganism powder, a liquid agent containing microorganism and a gelling agent containing microorganism. An antibacterial method suppresses the growth of bacteria existing in a space that is substantially enclosed by using a volatile component generated by a microorganism in a non-contacted manner or a deodorizing method decomposes stinking ingredient. The microorganism that generates the volatile component can be dried as being carried by a microorganism carrier to form a microorganism powder, or can be mixed with a solution of calcium oxide to form a liquid agent containing the microorganism, or the liquid is absorbed by a water-absorptive polymer to form a gelling agent containing the microorganism.
