To further increase the height of a protrusion per unit area of a sheet while maintaining the thinness of the sheet of an absorbent article and absorb more excretion liquid.An absorbent article according to the present invention has a front surface side sheet 51 and a back surface side sheet 52 disposed on a back surface side of the front surface side sheet 51. A large number of cells 55 are formed by bonding the front surface side sheet 51 and the back surface side sheet 52. A particulate material containing super absorbent polymer particles 53 is accommodated in the cell 55 to form an absorber 50. At least a part of the particulate material containing the super absorbent polymer particles 53 is not fixed to at least one of the front surface side sheet 51 and the back surface side sheet 52. In at least one of the front surface side sheet 51 and the back surface side sheet 52, sites other than the sites where the sheets are bonded each other are shrunk into a pleat shape.
