An absorbent article in which an absorber is unlikely to be wrinkled and in which side leakage is unlikely to occur is provided. A sanitary napkin (1) is provided in which an absorber (4) is interposed between a liquid-permeable surface sheet (3) and a back sheet (2), and in which an emboss (10) is provided in each of both side portions of the absorber (4) along a substantially longitudinal direction. The emboss (10) is formed in such a pattern that a plurality of straight portions (11) and arc-shaped portions (12) which protrude outwardly in the direction of the width of the napkin with the edges of the straight portions (11) being base points are alternately arranged. A plurality of arc-shaped portions (12) are arranged, and thus the resistance to a leg pressure from the outside in the width direction is increased, with the result that the absorber is unlikely to be wrinkled and leakage caused by the wrinkle is unlikely to occur. The flow of a body fluid diffused from the center side in the width direction toward the outside in the longitudinal direction of the napkin along the straight portion (11) is produced, and thus the diffusion in the width direction is reduced, with the result that side leakage is unlikely to occur.
