PROBLEM TO BE SOLVED: To provide an easily-wearable tape-type disposable diaper.SOLUTION: The tape-type disposable diaper includes a cutting line 13D formed on a tape-type disposable side flap part SF towards a width-directional central part into a protrusion shape. A folding-back piece 13T surrounded by the cutting line 13D is foldable towards an outer surface side. The folding-back piece 13T includes a locking material 13A at the outer surface thereof and the locking material 13A is exposed to a body-side surface by folding-back of the folding-back piece 13T.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2016,JPO&INPIT【課題】装着が容易なテープタイプ使い捨ておむつとする。【解決手段】テープタイプ使い捨のサイドフラップ部SFを、幅方向中央に向かって凸形状をなす切込み線13Dを形成し、この切込み線13Dで囲まれる折り返し片13Tが外面側に折り返し可能とされ、折り返し片13Tの外面に係止材13Aが備えられ、この係止材13Aが折り返し片13Tの折り返しにより身体側表面に露出する構成とする。【選択図】図7