To provide a method for manufacturing a disposable garment for the lower body such that the disposable garment has excellent stretchability and water absorbency and is comfortable to wear, and such that the manufacturing process can be simplified and manufacturing costs can be minimized. A method for manufacturing a disposable garment for the lower body includes at least: a raw material extending step of preparing at least a first long nonwoven fabric and an elastic member as raw materials of the disposable garment for the lower body and causing the prepared raw materials to be extended in a conveyance direction a composite sheet forming step of joining one surface of the first long nonwoven fabric that has been extended in the raw material extending step with one surface of the elastic member having elasticity at least in the conveyance direction to form a composite sheet in which an elastic member joined region is provided on the one surface of the first long nonwoven fabric and a leg portion hole forming step of providing, at a predetermined interval in the conveyance direction, through holes as leg portion holes in the elastic member joined region of the composite sheet formed in the composite sheet forming step.本發明提供一種伸長性、吸水性、穿著感優異且能夠將製造步驟簡化而抑制製造成本之拋棄式下半身用衣物之製造方法。本發明之拋棄式下半身用衣物之製造方法至少包括:原材料延出步驟,其至少準備第1長條不織布及彈性構件作為上述拋棄式下半身用衣物之原材料,並使上述所準備之原材料向搬送方向延出;複合片材形成步驟,其將至少於上述搬送方向上具有伸縮性之彈性構件之一側面接合於藉由上述原材料延出步驟延出之上述第1長條不織布之一側面,而於上述第1長條不織布之一側面形成設置有彈性構件接合區域之複合片材;及腳部孔形成步驟,其於藉由上述複合片材形成步驟形成之上述複合片材之彈性構件接合區域,於上述搬送方向上每隔既定間隔設置腳部孔用之貫通孔,而形成上述腳部孔。10‧‧‧拋棄式下半身用衣物20a‧‧‧前身片20b‧‧‧後身片22a‧‧‧前主體部22b‧‧‧後主體部24‧‧‧胯下部26‧‧‧腳部孔30‧‧‧回折部32a‧‧‧端部32b‧‧‧端部33a‧‧‧端部33b‧‧‧端部40‧‧‧彈性片材42‧‧‧接合部44‧‧‧吸收體52‧‧‧彈性構件
