To provide a device which easily refils the detergent of a pack without a residue and cumbersome operations, wherein the pack can be left untouched safely for a long period of time.

A deformable funnel has a special shape. Therefore, when the refilling detergent pack is put into the funnel in the manner that the pouring opening of a corner of the pack is on the lower side, the special shape has a narrowed cross section so as to prevent the pack from moving a lot back and forth in the thickness direction of the pack, the vicinities of the left and right corners of the refilling detergent pack can be housed in the funnel, and a dropping tube of the funnel is positioned approximately immediately below the pouring opening of the pack. The detergent refilling device uses the deformable funnel, the upper ends of a pair of L-shaped plate springs are attached as clips to the side surfaces thereof, the lower ends of the plate springs horizontally bent mutually inward are cut semicircularly, the pair of incisions are at the position near the dropping opening of the funnel so as to surround the opening, and a suspending string for suspending it by the funnel is provided. Alternatively, a deformable funnel having the described special shape without the clips is provided with the suspending string for suspending the funnel, and the suspending string is attached to a chain, perforated plate, etc. in the detergent refilling device.