PROBLEM TO BE SOLVED: To suppress the uneven distribution of an absorbent material within a cell while maintaining the advantages of an absorber having the absorbent material movably enclosed within a number of cells.SOLUTION: The absorbent article includes the absorber 56. The absorber includes: a first sheet 57 a second sheet 58 having a number of pleats juxtaposed thereon to extend in a predetermined direction and the absorbent material 59 arranged between the first and second sheets 57, 58. The first sheet 57 is bonded to the first sheet-side bottom at each pleat of the second sheet to form a joint portion, while the first sheet 57 is not bonded to the second sheet 58 each between these joint portions to form a tunnel-like cell 56C, and the granular absorbent material 59 containing at least high absorptive polymer particles is enclosed within each cell 56C to be movable with an enough clearance. A slender partitioning elastic member 80 is fixed, in a stretched state, on the reverse side of the absorber 56 along a direction crossing the longitudinal middle of at least a part of the cells.
