A method of producing an organic silver salt dispersion, the method comprising: mixing a first aqueous solution including a water-soluble silver ion supplier and a second aqueous solution including an alkali metal salt of an organic acid to form an organic silver salt dispersion; wherein, the mixing is conducted in the presence of at least one compound selected from polyacrylamide and derivatives of polyacrylamide, and at least 10 mass % (in terms of silver quantity) of the organic silver salt in the organic silver salt dispersion is formed by simultaneous addition of the first aqueous solution and the second aqueous solution to an aqueous medium followed by mixing.