Between the first nonwoven fabric (30 mf 1) continuous in the conveying direction and the second nonwoven fabric (30 mf 2) arranged in a superimposed manner on the first nonwoven fabric (30 mf 1) and continuous in the conveying direction, elasticity Conveying a sheet (30 mf) fixed on a region (AH 1) corresponding to the high elastic region (AH) while the members (35 a, 35 a.) Are inserted side by side in the CD direction (55 p) is pushed in the thickness direction to the position between the elastic members (35 a, 35 a) adjacent in the CD direction in the region (AH 1) corresponding to the high elasticized region (AH) of the high elasticity region (30 mf) (S50) of forming the holes (h, h ...) in the region (AH1) and engaging the nonwoven fabrics (30mf1, 30mf2) with the edge part (he) of the hole part (h) ) With holes (30 mf) by cutting the elastic members (35 a, 35 a,...) in a region (AL 1) corresponding to the low elasticized region (AL) at a position downstream of the treatment position (P 51) And a step (S80) of forming a high elastic region (AH) and a low elastic region (AL) in the step (S80).搬送方向に連続する第1不織布(30mf1)と、第1不織布(30mf1)に重なって配されつつ搬送方向に連続する第2不織布(30mf2)との間に、伸長状態で搬送方向に連続する弾性部材(35a,35a…)が、CD方向に並んだ状態で介挿されつつ、高伸縮領域(AH)に対応する領域(AH1)に固定されてなるシート(30mf)を搬送する工程と、シート(30mf)の高伸縮領域(AH)に対応する領域(AH1)においてCD方向に隣り合う弾性部材(35a,35a)同士の間の位置に厚さ方向に押し込み部材(55p)を押し込むことで、領域(AH1)に孔部(h,h…)を形成し、孔部(h)の縁部(he)で不織布(30mf1,30mf2)同士を係合する工程(S50)と、同工程(S50)で孔部(h)を形成する処理位置(P51)よりも下流側の位置にて、低伸縮領域(AL)に対応する領域(AL1)で弾性部材(35a,35a…)を切断することでシート(30mf)に高伸縮領域(AH)と低伸縮領域(AL)とを形成する工程(S80)と、を有する。
