A disposable diaper (10) has leg elastic sections (75) which expand and contract in a product longitudinal direction disposed further to the inside in a product width direction than a pair of leg opening sections. The area between a rear leg opening section (35R) and a straight line that passes through the center in the product width direction parallel to the product longitudinal direction is larger than the area between a front leg opening section (35F) and the straight line which extends in the product longitudinal direction through the center of the leg opening sections in the product longitudinal direction. A pair of elastic buttock sections (77) which expand and contract in the product longitudinal direction is disposed further to the outside in the product width direction than the leg elastic sections. The distance (La) in the product width direction between the outer edge of a fastening tape in the product width direction and the elastic buttock section is shorter than the distance (Lb) in the product width direction between the center of the disposable diaper in the product width direction and the outer edge of the elastic leg section in the product width direction.
