PROBLEM TO BE SOLVED: To provide an antibacterial deodorization agent and an antibacterial deodorization method that can remove an odor and satisfactorily exhibit antibacterial action.SOLUTION: The present invention provides an antibacterial deodorization agent that contains an alkaline powder that turns into an aqueous solution or a dispersion with a pH of 12 or more, and an inorganic silica powder; and an antibacterial deodorization method that sets the antibacterial deodorization agent at or near an odor source.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】臭気を除去し、かつ抗菌作用を良好に発揮できる脱臭抗菌剤、及び脱臭抗菌方法を提供する。【解決手段】水溶液若しくは分散液のpHが12以上となるアルカリ性粉末と、無機シリカ系粉末とを含む脱臭抗菌剤、及び、臭気発生源及び/又はその近傍に当該脱臭抗菌剤を配置する脱臭抗菌方法である。【選択図】なし