An absorbent article comprising: an absorbent body provided between a liquid permeable topsheet and a backsheet, a convex portion of an absorbent body that is high toward a skin side being formed at a skin side surface of the absorbent body at a center portion in a width direction, wherein the convex portion includes a front convex portion designed to be provided at an area including a body fluid expelling portion of a wearer, a rear convex portion designed to be provided at an area including an intergluteal cleft of the wearer, and a constricted convex portion provided at an area connecting the front convex portion and the rear convex portion in a front-rear direction of the absorbent article whose both side edges are constricted toward an inner side, wherein the front convex portion is formed to be vertically long in the front-rear direction of the absorbent article, both side edges of the front convex portion being formed by linear lines extending in the front-rear direction of the absorbent article, the width of the front convex portion being the same over the entire length, the width of the front convex portion being 20 to 36 mm, wherein the rear convex portion is designed to be provided at an area from a start position of the intergluteal cleft of the wearer at a crotch side, in a rearward direction, to a position exceeding the intergluteal cleft, an end position of the intergluteal cleft or a middle position of the intergluteal cleft, the maximum width of the rear convex portion being 20 to 36 mm, the maximum width of the rear convex portion and the width of the front convex portion being the same width, and wherein both side edges of the constricted convex portion are formed by arc-shaped curves each having a center at outside in the width direction, an interface of the constricted convex portion with the front convex portion being provided at an area corresponding to a perineum portion of the wearer, the minimum width of the constricted convex portion being 10 to 20 mm, the length of the constricted convex portion in the front-rear direction being 45 to 75% of the length of the front convex portion in the front-rear direction. an absorbent body provided between a liquid permeable topsheet and a backsheet, a convex portion of an absorbent body that is high toward a skin side being formed at a skin side surface of the absorbent body at a center portion in a width direction, wherein the convex portion includes a front convex portion designed to be provided at an area including a body fluid expelling portion of a wearer, a rear convex portion designed to be provided at an area including an intergluteal cleft of the wearer, and a constricted convex portion provided at an area connecting the front convex portion and the rear convex portion in a front-rear direction of the absorbent article whose both side edges are constricted toward an inner side, a front convex portion designed to be provided at an area including a body fluid expelling portion of a wearer, a rear convex portion designed to be provided at an area including an intergluteal cleft of the wearer, and a constricted convex portion provided at an area connecting the front convex portion and the rear convex portion in a front-rear direction of the absorbent article whose both side edges are constricted toward an inner side, wherein the front convex portion is formed to be vertically long in the front-rear direction of the absorbent article, both side edges of the front convex portion being formed by linear lines extending in the front-rear direction of the absorbent article, the width of the front convex portion being the same over the entire length, the width of the front convex portion being 20 to 36 mm, wherein the rear convex portion is designed to be provided at an area from a start position of the intergluteal cleft of the wearer at a crotch side, in a rearward direction, to a position exceeding the intergluteal cleft, an end position of the intergluteal cleft or a middle position of the intergluteal cleft, the maximum width of the rear convex portion being 20 to 36 mm, the maximum width of the rear convex portion and the width of the front convex portion being the same width, and wherein both side edges of the constricted convex portion are formed by arc-shaped curves each having a center at outside in the width direction, an interface of the constricted convex portion with the front convex portion being provided at an area corresponding to a perineum portion of the wearer, the minimum width of the constricted convex portion being 10 to 20 mm, the length of the constricted convex portion in the front-rear direction being 45 to 75% of the length of the front convex portion in the front-rear direction.