Problem: to improve the perforability to the nonwoven fabric.The perforating member 80 is provided with a tip portion 81 for piercing the nonwoven fabric and gradually extending the piercing hole to perforate the expanded hole. The leading end portion 81 has a cross section S1, S2, S3 and S4 which intersect with each of the piercing holes gradually extended in the same manner as the expansion hole, and the center of each cross section is disposed on the cycloid curve LC.Diagram【課題】不織布への穿孔性を高める。【解決手段】穿孔部材80は、不織布を突き刺して刺孔を徐々に拡げて拡孔を穿孔する先端部81を備える。この先端部81は、徐々に拡げられる刺孔のそれぞれと交差する断面S1,S2,S3,S4が拡孔と同心の相似形に設けられ、断面それぞれの中心がサイクロイド曲線LC上に配置されている。【選択図】図4
