An absorbent article having a side sheet arranged on both side parts of a liquid permeable front-surface sheet on a skin side along a longitudinal direction, respectively, wherein a side emboss is formed on a skin side of a laminated part of the side sheet and the liquid permeable front-surface sheet by fusing the side sheet and the liquid permeable front-surface sheet, the side emboss sinking in toward a non-skin side; and, the side emboss comprises a plurality of large embosses formed to have a relatively larger area that are arranged at equal intervals to align linearly along the longitudinal direction of the absorbent article, and between the adjacent large embosses, a plurality of small embosses formed to have a relatively small area that are arranged in a wave-like shape along the longitudinal direction of the absorbent article with intervals, separated from the large embosses, an interval between the adjacent large embosses is 20 to 50 mm, a width dimension of the large emboss is 50% of an overlapping width of the side sheet and the liquid permeable front-surface sheet or larger, and the small embosses are arranged within a width sandwiched by a straight line (L o) connecting exterior ends of the large embosses in a width direction and a straight line (L i) connecting interior ends thereof, and the large emboss is formed such that an area becomes asymmetrical with respect to the width direction of the absorbent article, the large emboss is formed such that in a direction in which a wave form formed by the small embosses protrudes in the width direction of the absorbent article, a side with relatively small joining strength is aligned, and a side with relatively large joining strength is aligned in the direction opposite thereto, and the large embosses are arranged alternately such that adjacent large embosses (11, 11) are in a reverse direction in the width direction of the absorbent article. wherein a side emboss is formed on a skin side of a laminated part of the side sheet and the liquid permeable front-surface sheet by fusing the side sheet and the liquid permeable front-surface sheet, the side emboss sinking in toward a non-skin side; and, the side emboss comprises a plurality of large embosses formed to have a relatively larger area that are arranged at equal intervals to align linearly along the longitudinal direction of the absorbent article, and between the adjacent large embosses, a plurality of small embosses formed to have a relatively small area that are arranged in a wave-like shape along the longitudinal direction of the absorbent article with intervals, separated from the large embosses, an interval between the adjacent large embosses is 20 to 50 mm, a width dimension of the large emboss is 50% of an overlapping width of the side sheet and the liquid permeable front-surface sheet or larger, and the small embosses are arranged within a width sandwiched by a straight line (L o) connecting exterior ends of the large embosses in a width direction and a straight line (L i) connecting interior ends thereof, and the large emboss is formed such that an area becomes asymmetrical with respect to the width direction of the absorbent article, the large emboss is formed such that in a direction in which a wave form formed by the small embosses protrudes in the width direction of the absorbent article, a side with relatively small joining strength is aligned, and a side with relatively large joining strength is aligned in the direction opposite thereto, and the large embosses are arranged alternately such that adjacent large embosses (11, 11) are in a reverse direction in the width direction of the absorbent article.