An underpants-style absorbent article (1) has a longitudinal direction corresponding to the front-back direction of the wearer and a transverse direction that orthogonally crosses the longitudinal direction, and is provided with: an absorbent main body (10) that includes an absorbing body and that has a tridimensional gather disposed on both side sections of the longitudinal direction and an exterior member (11) disposed on the non-skin-facing side of the absorbent main body. A pair of side sealed sections (S, S), a waist opening (5), and a pair of leg openings (6, 6) are formed by bonding both side sections of an abdominal-side section located on the abdominal side of the wearer to both side sections of a backside section located on the back side of the wearer. In a natural flat state, an angle ([theta]) formed between a first hypothetical straight line (L1), which connects a lower edge (Sd) of the side sealed section and a leading end (8a) of the tridimensional gather, and a second hypothetical straight line (L2), which passes through the leading end (8a) of the tridimensional gather and extends in the traverse direction, is 40-60 DEG. The tridimensional gather (8) is disposed in such a way that the leading end (8a) thereof is located closer to the center in the traverse direction of the underpants-style absorbent article than a rising base end (8b) of the tridimensional gather.本發明係褲型吸收性物品(1),其具備吸收性本體(10)及外裝材(11),該吸收性本體(10)具有與穿著者之前後方向對應之縱方向及與該縱方向正交之橫方向,包含吸收體,於縱方向之兩側部具有立體褶皺,該外裝材(11)配置於吸收性本體之非肌膚對向面側,藉由將配置於穿著者之腹側之腹側部之兩側部與配置於穿著者之背側之背側部之兩側部接合,而形成一對側封部(S、S)、腰部開口部(5)及一對腿部開口部(6、6);且於自然平坦狀態下,將側封部之下端(Sd)與立體褶皺之前端(8a)連結的第1假想直線(L1)與穿過立體褶皺之前端(8a)並於橫方向(Y)上延伸的第2假想直線(L2)所成之角度(θ)為40°以上且60°以下,且立體褶皺(8)之前端(8a)較立起基端(8b)更靠褲型吸收性物品之橫方向中央側。1‧‧‧褲型拋棄式尿布5‧‧‧腰部開口部6‧‧‧腿部開口部8‧‧‧立體褶皺8a‧‧‧前端8b‧‧‧立起基端C‧‧‧胯下部Cs‧‧‧胯下部之側端部CL‧‧‧縱方向中央線L1‧‧‧第1假想直線L2‧‧‧第2假想直線L3‧‧‧立體褶皺之前端距立體褶皺之立起基端之距離L4‧‧‧胯下部之下端寬度L5‧‧‧側封部之下端與立體褶皺之前端之間之距離L7‧‧‧自然平坦狀態下側封部之下端與胯下部之側端部之間之褲型吸收性物品之橫方向Y之距離S‧‧‧側封部Sd‧‧‧側封部S之下端Y‧‧‧縱方向θ‧‧‧第1假想直線與第2假想直線
