A pull-up type absorptive article (1) is provided with a belly-side sheet member (2A), a back-side sheet member (2B), an absorptive body (3), and side seal sections (4, 4). The back-side sheet member (2B) is provided with back-side extension sections (21b) extending downward from the side seal sections (4). The absorptive body (3) is provided with: an absorptive body (33) which is longer than it is wide and side sheet sections (34) located on the outer sides of the side edges of the absorptive body (33), which extend in the longitudinal direction of the absorptive body, and having side gathers (34c) formed at least in a crotch section (C). The side sheet sections (34) have non-joined sections (34N) corresponding to the back-side extension sections (21b), and each non-joined section (34N) is located in a portion of the side sheet section (34), said portion being the portion thereof which is superposed on the back-side sheet member and being located closer to the crotch section (C). Elastic members (36) for forming the side gathers (34c) extend also to the non-joined sections, and the side sheet sections (34) have the stretchability also in the non-joined sections.本發明之褲型吸收性物品1具有腹側片材構件2A、背側片材構件2B、吸收性本體3及側封部4、4。背側片材構件2B具有較側封部4更向下方延伸之背側延伸部21b。吸收性本體3具有縱長之吸收體33、及位於較吸收體33之長度方向之兩側緣各自更靠外側且至少於跨下部C形成側部皺褶34c之側部片材部34。側部片材部34於與背側片材構件重疊之部分的靠近跨下部C之部分,具有對於背側延伸部21b之非接合部34N,側部皺褶34c形成用之彈性構件36亦延伸至該非接合部中,側部片材部34於該非接合部中亦表現出伸縮性。1‧‧‧褲型拋棄式尿片2A‧‧‧腹側片材構件2B‧‧‧背側片材構件2a、2b‧‧‧側緣部2a、2b、34A‧‧‧接合部2c‧‧‧上緣部2d‧‧‧下緣部3‧‧‧吸收性本體3a、3b、36b‧‧‧端部4‧‧‧側封部20a‧‧‧腹側本體部20b‧‧‧背側本體部21a‧‧‧腹側延伸部21b‧‧‧背側延伸部22a、23a‧‧‧延伸折回部23‧‧‧內層片材24、36‧‧‧彈性構件30‧‧‧線狀接合部34‧‧‧側部片材部34N‧‧‧非接合部A‧‧‧腹側部B‧‧‧背側部C‧‧‧跨下部G1‧‧‧腰部伸縮部G2‧‧‧腹圍伸縮部G3‧‧‧延伸部伸縮部L‧‧‧尿片全長L2、L3、L4、La、Lb‧‧‧長度L5、L6‧‧‧延伸長度
