Provided is a disposable wearing article adapted to keep the peripheries of the respective leg-openings in close contact with the wearers body with a good fit to prevent the absorbent core from being displaced and to prevent bodily fluids from leaking out sideways. Side flaps (61) of an absorbent chassis (12) are provided with a plurality of leg elastics (62) extending in a longitudinal direction (Y). Crossover regions (70) of the respective side flaps (61) are formed with fixed sub-regions (75) secured to an elasticized waist panel (11) and free sub-regions (76) lying outboard of the fixed sub-regions (75) in a transverse direction (X) and not secured to the elasticized waist panel (11). Each of spacing dimensions (R1, R2) in the transverse direction (X) between the adjacent leg elastics (62) is in a range of about 3.0 to about 10.0mm, a spacing dimension (R2) in the transverse direction between each of the opposite side edges (45c) of the absorbent core (45) and the innermost one of the leg elastics (62) is in a range of about 3.0 to about 10.0mm. Spaced regions (69, 71) in the transverse direction (X) between the adjacent leg elastics (62) arranged in the side flaps (61) are formed with transverse wrinkles (68) at a rate of 9 to 20 wrinkles/50mm.本發明之課題在提供一種,藉由使腿部開口緣部確實貼合於穿用者的身體,可防止吸收性芯的位置偏移與體液的側漏之用後即棄式穿著用物品。解決手段,在吸收性主體(12)的側翼(61),配設有往縱向(Y)延伸的複數條的腿部彈性體(62)。在側翼(61)的交叉部(70)形成有:固定在彈性腰部薄片體(11)的固定部位(75);以及位在固定部位(75)的橫向(X)的外方,且沒有固定在彈性腰部薄片體(11)的自由部位(76)。腿部彈性體(62)彼此的橫向(X)中的分離尺寸(R1、R3)約3.0~10.0mm,吸收性芯(45)的側緣(45c)與位在腿部彈性體(62)中的最內側的彈性體(62a)的橫向(X)中的分離尺寸(R2)在約3.0~10.0mm。又,在側翼(61)的腿部彈性體(62)彼此的橫向(X)中的分離部位(69、71)形成有9~20個/50mm的橫皺紋(68)。64‧‧‧套管65‧‧‧翻邊彈性體45c‧‧‧側緣66‧‧‧固定部61‧‧‧側翼62‧‧‧腿部彈性體62a‧‧‧內側腿部彈性體62c‧‧‧中央腿部彈性體62b‧‧‧外側腿部彈性體12g‧‧‧外側緣34‧‧‧第4彈性體25‧‧‧前腰部彈性體69‧‧‧分離部位71‧‧‧分離部位70‧‧‧分離部分R1‧‧‧外方分離部位的分離尺寸R2‧‧‧內側腿部彈性體與吸收性芯的側緣的橫向中的分離尺寸R3‧‧‧內方分離部位的分離尺寸W3‧‧‧側翼的橫向中的長度尺寸76‧‧‧自由部位75‧‧‧固定部位74‧‧‧交叉部52a‧‧‧最外接著線16‧‧‧前腰部薄片體52‧‧‧接著線50‧‧‧前接合域23‧‧‧內層薄片24‧‧‧外層薄片57‧‧‧防漏薄片45‧‧‧吸收性芯53‧‧‧內面薄片
