A top sheet of a disposable diaper includes projections and depressions. The projection and the depression extend in the front-back direction, and are arranged alternately in the width direction. The top sheet includes a first region disposed at least in the rear waistline region and a second region disposed at least in a crotch region. A height of the first projection is higher than a height of the second projection. A first depression is provided with a widthwise projection configured to divide a space in a first depression extending in a front-back direction. A pitch of the first projection in the width direction is larger than a pitch of the second projection in the width direction.
