An absorbent article comprising an absorbing body with a highly water-absorbent polymer interposed between an upper layer sheet disposed on the skin side and a lower layer sheet disposed on the non-skin side, wherein: the upper layer sheet has a plurality of first protrusions forming first space parts that are to be filled with the highly water-absorbent polymer and that expand to the skin side, and a plurality of second protrusions forming second space parts, each of which having a smaller volume than each of the first space parts, that are to be filled with the highly water-absorbent polymer and that expand to the skin side, the weight per unit area of the highly water-absorbent polymer filled into the first space parts is 50 to 300 g/m 2, the weight per unit area of the highly water-absorbent polymer filled into the second space parts is 20 to 150 g/m 2, and the weight per unit area of the highly water-absorbent polymer filled into the second space parts is smaller than the weight per unit area of the highly water-absorbent polymer filled into the first space parts, the volume ratio of the first space part: the second space part is 2 to 10: 1, and the first protrusions and the second protrusions are arranged alternately in a grid shape, the first protrusions are arranged at both sides of one second protrusion in the longitudinal direction and in the width direction such that the first protrusions adjoin the second protrusions, the second protrusions are arranged to adjoin one another in an oblique direction, a part in which the first protrusions do not intervene is provided between the adjacent second protrusions, and the expansion height of the second protrusions towards the skin side is made lower than the expansion height of the first protrusions towards the skin side. the upper layer sheet has a plurality of first protrusions forming first space parts that are to be filled with the highly water-absorbent polymer and that expand to the skin side, and a plurality of second protrusions forming second space parts, each of which having a smaller volume than each of the first space parts, that are to be filled with the highly water-absorbent polymer and that expand to the skin side, the weight per unit area of the highly water-absorbent polymer filled into the first space parts is 50 to 300 g/m 2, the weight per unit area of the highly water-absorbent polymer filled into the second space parts is 20 to 150 g/m 2, and the weight per unit area of the highly water-absorbent polymer filled into the second space parts is smaller than the weight per unit area of the highly water-absorbent polymer filled into the first space parts, the volume ratio of the first space part: the second space part is 2 to 10: 1, and the first protrusions and the second protrusions are arranged alternately in a grid shape, the first protrusions are arranged at both sides of one second protrusion in the longitudinal direction and in the width direction such that the first protrusions adjoin the second protrusions, the second protrusions are arranged to adjoin one another in an oblique direction, a part in which the first protrusions do not intervene is provided between the adjacent second protrusions, and the expansion height of the second protrusions towards the skin side is made lower than the expansion height of the first protrusions towards the skin side.