The present invention provides a hydrogen peroxide aqueous solution for disinfection, which is used in the form of mist or vapor, leaves little residue on a spray nozzle, and enables easy residue removal by rinsing with water. One embodiment of the present invention pertains to a hydrogen peroxide aqueous solution for disinfection, which is used in the form of mist or vapor, and which comprises hydrogen peroxide, 2-8 ppm of orthophosphoric acid or phosphonic acid, 10-500 ppb of aluminum, and sulfate ions, wherein the contained amount of sulfate ions is, in mass ratio, equal to or more than 10-20 times of the contained amount of aluminum.本發明提供以霧氣或蒸氣的形式使用的殺菌用之過氧化氫水溶液，於噴霧噴嘴之殘渣附著少，而且利用水洗所為之殘渣除去係為容易。可藉由本發明之一實施形態亦即下列之水溶液來解決上述課題：一種水溶液，係以霧氣或蒸氣的形式使用的殺菌用之過氧化氫水溶液；含有過氧化氫、2ppm以上、8ppm以下之正磷酸或膦酸、10ppb以上、500ppb以下之鋁、以及硫酸離子；該硫酸離子之含量相對於該鋁之含量，按質量比計，為10倍以上並為20倍以下。
