PROBLEM TO BE SOLVED: To provide a pants-type diaper capable of suppressing liquid leakage while suppressing deterioration of fit. A pants-type diaper includes an abdominal waist belt 2, a back waist belt 3, and an absorbent main body 10 including an absorbent body 14. The absorbent body comprises a superabsorbent polymer and has at least one channel 48 extending along the longitudinal direction. The back side waist belt or the abdominal side waist belt is located in the center portion in the width direction and is adjacent to both sides in the width direction of the low elasticity region 31 with low elasticity in the width direction and the width direction elasticity. And a pair of high expansion/contraction regions 32, 32 having a high height. At least one of the rear side and the front side in the longitudinal direction of the channel overlaps the low-elasticity region in the thickness direction. In plan view, the inner edge K in the width direction in the high expansion/contraction region is located between the end edge 14EW of the absorber facing the high expansion/contraction region in the width direction and the channel. [Selection diagram] Figure 1【課題】パンツ型おむつにおいて、フィット性の低下を抑制しつつ、液体の漏れを抑制可能なパンツ型おむつを提供する。【解決手段】パンツ型おむつは、腹側ウエストベルト２と、背側ウエストベルト３と、吸収体１４を含む吸収性本体１０と、を備える。吸収体は、高吸水性ポリマーを含み、長手方向に沿って延びる少なくとも一本のチャネル４８を有する。背側ウエストベルト又は腹側ウエストベルトは、幅方向の中央部に位置し、幅方向の伸縮性が低い低伸縮域３１と、低伸縮域の幅方向の両側に隣接し、幅方向の伸縮性が高い一対の高伸縮域３２、３２と、を有する。チャネルの長手方向の後側及び前側の少なくとも一方の部分が、低伸縮域と厚さ方向に重なる。平面視で、高伸縮域における幅方向の内側の端縁Ｋは、吸収体における幅方向の当該高伸縮域に対向する端縁１４ＥＷとチャネルとの間に位置する。【選択図】図１
