PROBLEM TO BE SOLVED: To improve a stability of olopatadine, in an aqueous composition containing olopatadine and a nonionic surfactant, stored in a given container.SOLUTION: An aqueous composition is composed by mixing: at least one kind of terpenoid selected from the group consisting of menthol, camphor, borneol and cineole olopatadine and a nonionic surfactant. Preferably, at least one kind selected from the group consisting of a glycyrrhizinic acid and a salt thereof, is further mixed.