PROBLEM TO BE SOLVED: To maintain the shape of a waist circumference portion while improving the flexibility of the waist circumference portion of a pants-type absorbent article. SOLUTION: The pants-type absorbent article (1) has a waist circumference portion (20) having a pair of sheets (21, 22) and a plurality of elastic members (23), and the elastic member (23). At least one is a pair of end fixing portions (21,22) that are continuous from one end to the other end of the waist circumference (20) in the left-right direction and both ends in the left-right direction are fixed to a pair of seats (21, 22). It has a 50) and a non-fixed portion (51) that is not fixed to a pair of seats (21, 22) inside the end fixed portion (50) in the left-right direction, and has a locking portion (40) in the left-right direction. ), The reinforcing means (60) for reinforcing the region is arranged, and the reinforcing means (60) is not arranged in at least a part of the region where the non-fixed portion (51) is located. [Selection diagram] Fig. 4【課題】パンツ型吸収性物品の胴周り部の柔軟性を向上させつつ、胴周り部の形状を維持すること。【解決手段】パンツ型吸収性物品（１）であって、胴周り部（２０）は一対のシート（２１，２２）と複数の伸縮部材（２３）とを有し、伸縮部材（２３）の少なくとも一つは、胴周り部（２０）の左右方向の一端部から他端部まで連続し、左右方向の両端部が一対のシート（２１，２２）に固定された一対の端部固定部（５０）と、左右方向における端部固定部（５０）よりも内側において一対のシート（２１，２２）に固定されていない非固定部（５１）とを有し、左右方向における係止部（４０）よりも外側の領域に、当該領域を補強する補強手段（６０）が配置され、非固定部（５１）が位置する領域の少なくとも一部には補強手段（６０）が配置されていない。【選択図】図４
