The present invention is provided with: a step for conveying a sheet (30mf) obtained by fixing, in areas (AH1) corresponding to high stretchability areas (AH), elastic members (35a, 35a …) which are continuous in the conveyance direction in a stretched state, and interposed in a state of being arranged in the CD direction between a first non-woven fabric (30mf1) which is continuous in the conveyance direction, and a second non-woven fabric (30mf2) which is provided overlapping the first non-woven fabric (30mf1), and which is continuous in the conveyance direction； a step (S50) in which push-in members (55p) are pushed in the thickness direction into positions between adjacent elastic members (35a, 35a) in the CD direction, in the areas (AH1) corresponding to the high stretchability areas (AH) of the sheet (30mf), to form holes (h, h…) in the areas (AH1), and make the non-woven fabrics (30mf1, 30mf2) engage with each other at edges (he) of the holes (h)； and a step (S80) in which the elastic members (35a, 35a…) are cut in areas (AL1) corresponding to low stretchability areas (AL), at a position located further downstream than a processing position (P51) where the holes (h) are formed in step (S50), to form the high stretchability areas (AH) and the low stretchability areas (AL) in the sheet (30mf).La présente invention comporte: une étape de transport d'une feuille (30 mf) obtenue par fixation, dans des zones (AH1) correspondant à des zones d'extensibilité élevée (AH), des éléments élastiques (35a, 35a …) qui sont continus dans la direction de transport lorsqu'ils sont dans un état étiré, et interposés dans un état où ils sont agencés dans la direction CD entre un premier tissu non tissé (30mf1) qui est continu dans la direction de transport, et un second tissu non tissé (30mf2) qui est disposé de manière à chevaucher le premier tissu non tissé (30mf1), et qui est continu dans la direction de transport； une étape (S50) dans laquelle des éléments de poussée (55p) sont
