To provide allergen reduction fibers capable of automatically reducing allergen adhered to a fiber product without giving allergen reduction treatment and capable of recovering allergen reduction functions with easy operation.

An allergen reduction component is graftized, dissolved, or distributed, solvent and/or binder and is chemically fixed on a fiber and/or after connected on a fiber in an allergen reduction bedding. It is preferable that the allergen reduction component is at least one species selected from the group consisting of an aromatic hydroxy compound; alkaline metal carbonate, alum, lauryl benzensulfonic acid, lauryl sulfate and polyoxyethylene lauryl ether sulfate; phosphate zinc sulfate and/or lead acetate.