The present invention provides a container for storing a photocatalyst suspension, which can suppress oxidation of silver ions contained in an aqueous suspension stored in the container. A photocatalytic suspension storage container of the present invention is a container for storing an aqueous suspension comprising silver ion carriers and photocatalyst particles, said container having an antioxidant layer on an inner surface, Water-soluble antioxidant particles and a binder layer. Figure 1

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