A sheet-like article for an absorbent article, the sheet-like article comprising a plurality of absorbent units, each absorbent unit including a long base portion having a lateral direction, a longitudinal direction that is longer than the lateral direction, and a thickness direction, and water-absorbent polymer particles that are fixed to a surface of one face of the long base portion, wherein the water-absorbent polymer particles are fixed to the long base portions by an adhesive, the absorbent units being arranged such that the absorbent unit's longitudinal direction is oriented at least in one direction, wherein: before the water-absorbent polymer particles absorb a liquid, the water-absorbent polymer particles are located inward of both lateral side edge portions, of the long base portion, that extend along the longitudinal direction; and when the water-absorbent polymer particles absorb a liquid, the water-absorbent polymer particles swell beyond the long base portion's lateral side edge portions, and a position, in the thickness direction, of the long base portion is varied from the position thereof before absorbing the liquid, wherein a distance between the long base portion's both lateral side edge portions that extend along the longitudinal direction is greater than an average particle size of the water-absorbent polymer particles in a state before absorbing a liquid, and is smaller than an average particle size of the water-absorbent polymer particles in a swollen state after absorbing a liquid, wherein there is no intervening member present between the absorbent units adjacent to one another in the lateral direction, wherein the sheet-like article includes, in each of both end portions in the longitudinal direction, a non-slit region in which the plurality of long base portions are connected in the lateral direction. a long base portion having a lateral direction, a longitudinal direction that is longer than the lateral direction, and a thickness direction, and water-absorbent polymer particles that are fixed to a surface of one face of the long base portion, wherein the water-absorbent polymer particles are fixed to the long base portions by an adhesive, before the water-absorbent polymer particles absorb a liquid, the water-absorbent polymer particles are located inward of both lateral side edge portions, of the long base portion, that extend along the longitudinal direction; and when the water-absorbent polymer particles absorb a liquid, the water-absorbent polymer particles swell beyond the long base portion's lateral side edge portions, and a position, in the thickness direction, of the long base portion is varied from the position thereof before absorbing the liquid, wherein a distance between the long base portion's both lateral side edge portions that extend along the longitudinal direction is greater than an average particle size of the water-absorbent polymer particles in a state before absorbing a liquid, and is smaller than an average particle size of the water-absorbent polymer particles in a swollen state after absorbing a liquid, wherein there is no intervening member present between the absorbent units adjacent to one another in the lateral direction, wherein the sheet-like article includes, in each of both end portions in the longitudinal direction, a non-slit region in which the plurality of long base portions are connected in the lateral direction.