A disposable diaper (10) includes: a pair of leg stretch units (75a) formed along a leg hole openings (35) and being stretchable in at least a product longitudinal direction (L) and a cushioning unit (75b) provided in a region adjacent to the ends (#1) of the leg stretch units (75a) in the product longitudinal direction (L) the leg stretch units (75a) are configured from a stretchable sheet member the ratio of expansion and contraction of the cushioning unit (75b) is configured to be lower than the ratio of expansion and contraction of the leg stretch units (75a) and the length (W1) of at least a part of the cushioning unit (75b) in a product widthwise direction (W) is configured to be longer than the length (W2) of the leg stretch units (75a) in the product widthwise direction (W).本發明之課題係在於減低肌膚抵接面側之扣帶的基端部與沿著腳圍開口部所形成的腳伸縮部之間的區域對穿用者的肌膚之刺激。用以解決課題之手段為,本發明之用後即棄式紙尿布(10)係具備沿著腳圍開口部(35)形成且至少可朝製品長度方向(L)伸縮之一對腳伸縮部(75a);和設在與製品長度方向(L)之腳伸縮部(75a)的端部鄰接的區域之緩衝部(75b),腳伸縮部(75a)係藉由伸縮性薄片構件所構成,緩衝部(75b)的伸縮率係構成為較腳伸縮部(75a)的伸縮率低,製品寬度方向(W)之緩衝部(75b)的至少一部分之長度(W1)係構成為較製品寬度方向(W)之腳伸縮部(75a)的長度(W2)長。10‧‧‧開放型用後即棄式紙尿布20‧‧‧前腰圍區域25‧‧‧胯下區域30‧‧‧後腰圍區域35‧‧‧腳圍開口部40‧‧‧吸收體70‧‧‧側翼片80‧‧‧腳側皺褶81‧‧‧接合部分82‧‧‧自由端部分90‧‧‧扣帶90a‧‧‧目標帶100‧‧‧腰圍伸縮部110、115、125‧‧‧低剛性區域120‧‧‧伸縮抑制區域200‧‧‧褲襠部200a‧‧‧胯下伸縮部400‧‧‧腰圍保持部
