PROBLEM TO BE SOLVED: To provide an absorbent article using water-absorbent resin particles which gives an absorbent body capable of stably obtaining a suitable permeation rate without depending on the composition of a liquid. An absorbent article (100) includes an absorbent body (10), the absorbent body (10) contains water absorbent resin particles (10a), and a water retention amount of a 0.01 mass% sodium salt aqueous solution in the water absorbent resin particles (10a) is 0. The standard deviation between the water retention capacity of the 0.01 mass% aqueous solution of potassium salt, the water retention capacity of the 0.01 mass% aqueous solution of magnesium salt, and the water retention capacity of the 0.01 mass% aqueous solution of calcium salt is 20 g/g or less. is there. [Selection diagram] Figure 1
