Provided is a disposable undergarment which ensures a good fit in the waist area, is not susceptible to the leg elastic in the rear waist area being affected by shrinkage of the waist elastic body, and does not detract from visual appearance when viewed from the rear. The inner edge part of the front waist area (14) is divided up into a pair of first elastic areas (61) which face one another but are separate from one another in the lateral direction (X), and a first non-elastic area (62) positioned between the first elastic areas (61). The inner edge part of the rear waist area (15) is divided up into a pair of second elastic areas (63) which face one another but separate from one another in the lateral direction (X), and a second non-elastic area (64) positioned between the second elastic areas (63). The crotch panel (13) has a pair of leg elastic bodies (50) that intersect with first and second elastic areas (61, 63). The dimension of the second non-elastic area (64) in the lateral direction (X) is greater than that of the first non-elastic area (62), and the dimension of the first intersecting site (66) in the lateral direction (X) is greater than that of the second intersecting site (67).本發明之課題在提供一種,既可確保前腰域的貼合性,且在後腰域,腿彈性體也不會受到腰部彈性體的伸縮的影響,在背面觀看不會損害外觀的用後即棄式穿著用物品。解決手段,在前腰域(14)的內端部,被劃定成互相在橫向分開對向的一對的第1彈性域;以及位在第1彈性域間的第1非彈性域,在後腰域的內端部,被劃定成互相在橫向分開對向的一對的第2彈性域;以及位在第2彈性域的第2非彈性域。胯下薄片體具有與第1及第2彈性域交叉的一對的腿彈性體。第2非彈性域的橫向的尺寸是形成比第1非彈性域的這個更大,第1交叉部位的橫向的尺寸是形成比第2交叉部位的這個更大。19c‧‧‧後腰域的側緣32‧‧‧第2彈性體19b‧‧‧後腰域的上端緣10‧‧‧用後即棄式穿著用物品34‧‧‧第4彈性體36‧‧‧內端部34b‧‧‧外端緣R2‧‧‧橫向X的尺寸63‧‧‧第2彈性域47‧‧‧後端部34a‧‧‧內端緣19a‧‧‧後腰域的下端緣15‧‧‧後腰域19d‧‧‧兩側緣67‧‧‧第2交叉部位50‧‧‧腿彈性體48‧‧‧中間部11‧‧‧吸收體66‧‧‧第1交叉部位33‧‧‧第3彈性體13‧‧‧胯下薄片體33b‧‧‧外端緣18c‧‧‧前腰域的側緣R1‧‧‧橫向X的整體尺寸61‧‧‧第1彈性域33a‧‧‧內端緣62‧‧‧第1非彈性域18a‧‧‧前腰域的下端緣(前腰薄片體的內端緣)18b‧‧‧前腰域的上端緣(前腰薄片體的外端緣)14‧‧‧前腰域18d‧‧‧前腰域的側緣31‧‧‧第1彈性體64‧‧‧第2非彈性域
