PROBLEM TO BE SOLVED: To provide sterilized water which contributes to environmental protection in connection with recycling of shell, which is highly efficient and highly convenient, which is applicable to various uses, and which exhibits a bactericidal effect and virus deactivation, and to provide an antiviral agent, washing water for sterilization in a perishable food processing system, and an insecticide for poultry.SOLUTION: Sterilized water is obtained by dissolving 0.01-30 wt.% of calcinated shell calcium with an average particle size of 25 nm to 10 &mu；m, 0.01-30 wt.% of carbonates, 0.01-30 wt.% of organic acid salts, and 0.01-30 wt.% of a natural porous clay mineral in purified water.
