An absorbent article comprising: an absorbent body including an absorbent core and a skin-side sheet disposed on a skin side with respect to the absorbent core; and a pair of leakproof wall portions including a stretching/contracting member that stretches and contracts, in a state in which the absorbent article is unfolded, the absorbent body having a front-back direction and a lateral direction that intersect each other, the pair of leakproof wall portions being provided on two lateral sides of the absorbent body, a front fixing portion being provided in a front end portion of the absorbent body and fixing the leakproof wall portions so that the leakproof wall portions are incapable of rising, a back fixing portion being provided in a back end portion of the absorbent body and fixing the leakproof wall portions so that the leakproof wall portions are incapable of rising, an intermediate fixing portion being provided between the front fixing portion and the back fixing portion in the front-back direction, the intermediate fixing portion fixing the leakproof wall portions to the skin-side sheet, the intermediate fixing portion being provided at a position apart from the front fixing portion and the back fixing portion in the front-back direction, the intermediate fixing portion having a first intermediate fixing portion and a second intermediate fixing portion, the first intermediate fixing portion being disposed on a lateral one side, the second intermediate fixing portion being disposed on a lateral other side, a position of a front end of the first intermediate fixing portion and a position of a front end of the second intermediate fixing portion being different in the front-back direction. an absorbent body including an absorbent core and a skin-side sheet disposed on a skin side with respect to the absorbent core; and a pair of leakproof wall portions including a stretching/contracting member that stretches and contracts, in a state in which the absorbent article is unfolded, the absorbent body having a front-back direction and a lateral direction that intersect each other, the pair of leakproof wall portions being provided on two lateral sides of the absorbent body, a front fixing portion being provided in a front end portion of the absorbent body and fixing the leakproof wall portions so that the leakproof wall portions are incapable of rising, a back fixing portion being provided in a back end portion of the absorbent body and fixing the leakproof wall portions so that the leakproof wall portions are incapable of rising, an intermediate fixing portion being provided between the front fixing portion and the back fixing portion in the front-back direction, the intermediate fixing portion fixing the leakproof wall portions to the skin-side sheet, the intermediate fixing portion being provided at a position apart from the front fixing portion and the back fixing portion in the front-back direction, the intermediate fixing portion having a first intermediate fixing portion and a second intermediate fixing portion, the first intermediate fixing portion being disposed on a lateral one side, the second intermediate fixing portion being disposed on a lateral other side, the first intermediate fixing portion being disposed on a lateral one side, the second intermediate fixing portion being disposed on a lateral other side, a position of a front end of the first intermediate fixing portion and a position of a front end of the second intermediate fixing portion being different in the front-back direction.