A cleaning element, comprising: a fiber bundle comprising a plurality of fibers and extending in a predetermined longitudinal direction, an upper face side sheet overlaid on an upper face of the fiber bundle, and a cleaning side sheet overlaid on a lower face of the fiber bundle and facing an object to be cleaned, wherein: the upper face side sheet and the cleaning side sheet are formed of sheet-like nonwoven fabric and joined together in the laminated state on the fiber bundle at a joining portion that extends in said longitudinal direction, both of the sheets (111a, 111c) having a plurality of sheet pieces (111f, 111d) extending parallel in a direction crossing said longitudinal direction, the sheet pieces of the cleaning side sheet and the fibers of the fiber bundle extend elongate in the direction crossing said longitudinal direction, having a fixed end only at said joining portion and free ends on the sides opposite to the joining portion, the sheet pieces of the cleaning side sheet have a smaller width in said longitudinal direction than the sheet pieces of the upper face side sheet, and the fiber bundle has crimped fibers, and at least part of the crimped fibers are entangled with the sheet pieces of the cleaning side sheet and swing together with the sheet pieces around the joining portion toward the object to be cleaned. a fiber bundle comprising a plurality of fibers and extending in a predetermined longitudinal direction, an upper face side sheet overlaid on an upper face of the fiber bundle, and a cleaning side sheet overlaid on a lower face of the fiber bundle and facing an object to be cleaned, wherein: the upper face side sheet and the cleaning side sheet are formed of sheet-like nonwoven fabric and joined together in the laminated state on the fiber bundle at a joining portion that extends in said longitudinal direction, both of the sheets (111a, 111c) having a plurality of sheet pieces (111f, 111d) extending parallel in a direction crossing said longitudinal direction, the sheet pieces of the cleaning side sheet and the fibers of the fiber bundle extend elongate in the direction crossing said longitudinal direction, having a fixed end only at said joining portion and free ends on the sides opposite to the joining portion, the sheet pieces of the cleaning side sheet have a smaller width in said longitudinal direction than the sheet pieces of the upper face side sheet, and the fiber bundle has crimped fibers, and at least part of the crimped fibers are entangled with the sheet pieces of the cleaning side sheet and swing together with the sheet pieces around the joining portion toward the object to be cleaned. the upper face side sheet and the cleaning side sheet are formed of sheet-like nonwoven fabric and joined together in the laminated state on the fiber bundle at a joining portion that extends in said longitudinal direction, both of the sheets (111a, 111c) having a plurality of sheet pieces (111f, 111d) extending parallel in a direction crossing said longitudinal direction, the sheet pieces of the cleaning side sheet and the fibers of the fiber bundle extend elongate in the direction crossing said longitudinal direction, having a fixed end only at said joining portion and free ends on the sides opposite to the joining portion, the sheet pieces of the cleaning side sheet have a smaller width in said longitudinal direction than the sheet pieces of the upper face side sheet, and the fiber bundle has crimped fibers, and at least part of the crimped fibers are entangled with the sheet pieces of the cleaning side sheet and swing together with the sheet pieces around the joining portion toward the object to be cleaned.