An object of the present invention is to improve fitting performance of a front waist section in a pull-on disposable diaper.There is provided a pull-on disposable diaper (1) having a vertical direction, a lateral direction and a thickness direction that are orthogonal to one another, the pull-on disposable diaper (1) including: an absorbent main body (10) that absorbs liquid a front waist section (3) positioned at one end part of the absorbent main body (10) in a longitudinal direction and a back waist section (4) positioned at another end part of the absorbent main body (10) in the longitudinal direction, the front waist section (3) having a lower end part on which an elastic member (361g) that is extendable in the lateral direction is provided, the elastic member (361g) including an inclined section (361gc) that is inclined obliquely upward from an outside toward an inside in the lateral direction, at least in a region where the elastic member (361g) overlaps with the absorbent main body (10) in the thickness direction, the elastic member (361g) being discontinuous at a center part of the absorbent main body (10) in the lateral direction.
