A disposable diaper (10) has elastic leg sections (75) which expand and contract in a product longitudinal direction (L) disposed further to the inside in a product width direction (W) than a pair of leg opening sections (35). The area between a rear leg opening section (35R) and a straight line (L1) which passes through the center in the product width direction (W) parallel to the product longitudinal direction (L) is larger than the area between a front leg opening section (35F) and the straight line (L1) which extends in the product longitudinal direction (L) through the center in the product width direction (W). Elastic buttock sections (77) which straddle a crotch region (25) and a rear waist region (30) and expand and contract in the product longitudinal direction (L) are disposed further to the outside in the product width direction (W) than the elastic leg sections (75). The extension percentage of the elastic buttock sections (77) is higher than the extension percentage of the elastic leg sections (75).
