Provided are powder of a pure disilver hydrogen citrate-containing composition in powder form, having excellent solubility, and a method for easily obtaining the disilver hydrogen citrate-containing composition with high efficiency. In addition, provided are an antibacterial agent or antiviral agent, containing the disilver hydrogen citrate-containing composition, and a method for producing the same. The method for producing a disilver hydrogen citrate-containing composition of the present invention includes the following processes (1) to (3): (1) preparing a reaction mixture containing a silver compound and citric acid, the reaction mixture having a pH of 2.0 to 5.5; (2) precipitating the disilver hydrogen citrate-containing composition from the reaction mixture; and (3) collecting the precipitated disilver hydrogen citrate-containing composition.