To provide a cleanser composition for automatic dish washers, which exhibits excellent cleansing forces also for egg-originated obstinate protein stains adhered to the surfaces of dishes, has excellent storage stability, has low corrosiveness to various metals, when used as aqueous solutions, and does not produce irritative odors even in a high concentration aqueous solution.

This cleanser composition for the automatic dish washers contains a dichloroisocyanurate and sodium metasilicate pentahydrate only whose particle surfaces are subjected to a low hydration treatment, as essential components.

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