Absorbent article

1. An absorbent article, comprising

a polymer sheet in which a superabsorbent polymer is provided between an upper layer sheet provided at a skin side, and a lower layer sheet provided at a non-skin side,

wherein a polymer provided region at which the superabsorbent polymer is provided, and a polymer non-provided region at which the superabsorbent polymer is not provided are formed in the polymer sheet,

wherein a liquid diffusion sheet that promotes diffusion of body fluid in a plane direction is stacked to be adjacent to a skin side surface of the lower layer sheet, the liquid diffusion sheet having a liquid permeability in a thickness direction of the liquid diffusion sheet that is lower than a liquid permeability of each of the upper layer sheet and the lower layer sheet, and

wherein the upper layer sheet is bonded with the liquid diffusion sheet under a state that the upper layer sheet contacts the liquid diffusion sheet, at the polymer non-provided region.

2. The absorbent article according to claim 1 , wherein Klemm water absorbency defined by JIS P8141 of the liquid diffusion sheet, by 10 minutes, is greater than or equal to 25 mm.

3. The absorbent article according to claim 1 ,

wherein the polymer sheet is sectioned into a plurality of first defined regions each, of whose inside is the polymer provided region, and second defined regions each of which is positioned at a center of the four adjacent first defined regions and each of whose inside is the polymer non-provided region,

wherein each of the first defined regions is surrounded by bonded portions at least at upper, lower, left and right positions, respectively, each of the bonded portions bonding the upper layer sheet with the liquid diffusion sheet, and

wherein the plurality of first defined regions are aligned in a square lattice fottn along a longitudinal direction and also a width direction of the absorbent article.

4. The absorbent article according to claim 1 ,

wherein the liquid diffusion sheet has a multi-layered structure in which a first sheet that promotes diffusion of the body fluid in the plane direction, and a second sheet whose liquid permeability in the thickness direction is lower than that of each of the upper layer sheet and the lower layer sheet are stacked, and

wherein the first sheet and the second sheet are provided in this order from the skin side.

5. The absorbent article according to claim 4 , wherein Klemm water absorbency defined by JIS P8141 of the first sheet of the liquid diffusion sheet, by 10 minutes, is greater than or equal to 25 mm.