It is intended to provide an eye drop preparation capable of preventing not only degradation of latanoprost in water but also adsorption of latanoprost onto a plastic container so that a decrease in latanoprost content thereof is satisfactorily prevented. The eye drop preparation contains an ophthalmic solution composition containing components (A) and (B) and packed in a plastic container: (A) latanoprost and (B) a nonionic surfactant.
