A pants-type disposable wearing article comprising a front waistline (3) and a back waistline (3) adapted to cover a wearer's torso, and the front and back waistlines Each of the front and rear waist portions includes a plurality of elastic members (32) extending in the waist direction (X) between two sheet pieces (31). In the state where the elastic member is contracted, a plurality of ridges (P) appear between the plurality of joint portions (41, 42, 43), and the front and rear waist portions overlap each other. The end portion (E3) of the front waistline portion and the end portion (E3) of the rear waistline portion are welded and joined to each other by the side seal (5), and the first closest to the side seal among the plurality of joint portions. 1st space interval of the expansion-contraction direction of 1 joining part (41) and a side seal ( 1), a second joint portion that are adjacent to each other in the intermediate portion between the ends of the waist section (42) smaller than the expansion and contraction direction of the second distance between (S2).パンツ型の使い捨て着用物品であって、着用物品（１）は、着用者の胴を覆うように適合された前胴回り部（３）および後胴回り部（３）と、前記前後の胴回り部に架設された吸収性本体（２）とを包含し、前記前後の胴回り部の各々は、胴回り方向（Ｘ）に延びる複数の弾性部材（３２）が２枚のシート片（３１）の間に挟まれて形成されており、弾性部材が収縮している状態において、複数の接合部（４１，４２，４３）の間に複数の襞（Ｐ）が現れるように構成され、前後の胴回り部は互いに重ねあわされ、前胴回り部の端部（Ｅ３）と後胴回り部の端部（Ｅ３）とが互いにサイドシール（５）により溶着接合されており、複数の接合部のうちサイドシールに最も近接した第１接合部（４１）とサイドシールとの伸縮方向の第１間隔（Ｓ１）が、胴回り部の端部間の中間部分において互いに隣り合う第２接合部（４２）同士の伸縮方向の第２間隔（Ｓ２）よりも小さい。
