Provided is a solid anti-bacterial agent which can release a steady amount of chlorine dioxide continuously even under vibrations or shocks and is easy to carry. A bagged anti-bacterial agent comprising an anti-bacterial agent (4) composed of an anti-bacterial substance supported on a porous inorganic solid carrier, a first bag body (2) in which the anti-bacterial agent is contained, and a second bag body (3) in which the first bag body is contained, wherein micropores each having a smaller diameter than the particle diameter of the inorganic solid carrier are provided over the entire surface of the first bag body, and release holes (31) through which the anti-bacterial substance is to be released into air are provided on the rim part of the second bag body.
