An underpants-shaped absorbent article having a vertical direction, a lateral direction, and a front-back direction that intersect each other, the underpants-shaped absorbent article comprising: an absorbent main body that is folded in the front-back direction at a vertically lower end portion, the absorbent main body including an absorbent core, a skin-side sheet and a pair of leak-proof wall portions, the absorbent core being arranged extending in the vertical direction, the skin-side sheet being arranged on a wearer skin side with respect to the absorbent core; a front waist portion that is joined to an upper end portion of the absorbent main body on a front side in the front-back direction; and a back waist portion that is joined to an upper end portion of the absorbent main body on a back side in the front-back direction, a lower end portion of the front waist portion not including an inclined elastic member that is inclined downward and inward in the lateral direction, the absorbent main body including an elastic member in two lateral side portions of the absorbent main body, the elastic member being capable of stretching and contracting in the vertical direction, each of the pair of leak-proof wall portions being capable of rising up on the skin side due to the elastic member, the absorbent main body including a front-end-portion fixed portion in the upper end portion on the front side, the front-end-portion fixed portion fixing each of the leak-proof wall portions in a manner that the leak-proof wall portion is not capable of rising up, the absorbent main body including a back-end-portion fixed portion in the upper end portion on the back side, the back-end-portion fixed portion fixing each of the leak-proof wall portions in a manner that the leak-proof wall portion is not capable of rising up, the absorbent main body including an intermittent fixed portion at a position spaced apart from the front-end-portion fixed portion and the back-end-portion fixed portion in the vertical direction, the intermittent fixed portion fixing each of the leak-proof wall portions to the skin-side sheet, in a state where the underpants-shaped absorbent article is unfolded and stretched in the vertical direction, a vertical center of the intermittent fixed portion is on a front-waist-portion side with respect to a vertical center of the underpants-shaped absorbent article. an absorbent main body that is folded in the front-back direction at a vertically lower end portion, the absorbent main body including an absorbent core, a skin-side sheet and a pair of leak-proof wall portions, the absorbent core being arranged extending in the vertical direction, the skin-side sheet being arranged on a wearer skin side with respect to the absorbent core; the absorbent core being arranged extending in the vertical direction, the skin-side sheet being arranged on a wearer skin side with respect to the absorbent core; a front waist portion that is joined to an upper end portion of the absorbent main body on a front side in the front-back direction; and a back waist portion that is joined to an upper end portion of the absorbent main body on a back side in the front-back direction, a lower end portion of the front waist portion not including an inclined elastic member that is inclined downward and inward in the lateral direction, the absorbent main body including an elastic member in two lateral side portions of the absorbent main body, the elastic member being capable of stretching and contracting in the vertical direction, each of the pair of leak-proof wall portions being capable of rising up on the skin side due to the elastic member, the absorbent main body including a front-end-portion fixed portion in the upper end portion on the front side, the front-end-portion fixed portion fixing each of the leak-proof wall portions in a manner that the leak-proof wall portion is not capable of rising up, the absorbent main body including a back-end-portion fixed portion in the upper end portion on the back side, the back-end-portion fixed portion fixing each of the leak-proof wall portions in a manner that the leak-proof wall portion is not capable of rising up, the absorbent main body including an intermittent fixed portion at a position spaced apart from the front-end-portion fixed portion and the back-end-portion fixed portion in the vertical direction, the intermittent fixed portion fixing each of the leak-proof wall portions to the skin-side sheet, in a state where the underpants-shaped absorbent article is unfolded and stretched in the vertical direction, a vertical center of the intermittent fixed portion is on a front-waist-portion side with respect to a vertical center of the underpants-shaped absorbent article.