The present invention is provided with an absorber (50) which includes: a plurality of cells (55) which are surrounded by bonded portions (54) of a front sheet (51) and a back sheet (52) and in which the front sheet (51) and the back sheet (52) are not bonded； and superabsorbent polymer particles (53) contained in the cells (55). The joined portions (54) include: weakly bonded portions (54b) which can be separated by the expansion force of the superabsorbent polymer particles (53) in adjoining cells (55)； and strongly bonded portions (54a) which do not separate by the expansion force of the superabsorbent polymer particles (53) in the adjoining cells (55). At least in the central portion in a width direction of a crotch portion, the bonded portions (54) are provided in a uniform pattern where most enlarged sections (57) which are surrounded by the strongly bonded portions (54a) are aligned in a front-back direction (LD) and a width direction (WD) and the most enlarged sections (57) on both sides in the width direction (WD) of the absorber (50) have longer front-back direction lengths (58).
