PROBLEM TO BE SOLVED: To suppress cut of a rubber thread when forming a bonding part of a sheet by using a pressure roller whose outer peripheral surface is rugged and a crimping part.SOLUTION: A manufacturing method (10) of a stretchable sheet supplies a rubber thread (14) at a supply angle position of a pressure roller (25) having a rugged surface, puts a first sheet part (11) and the rubber thread (14) between the pressure roller (25) and a press roller (23), puts the first sheet part (11) and a second sheet part (12) via the rubber thread (14) between the pressure roller (25) and a crimping part (26), bonds the first sheet part (11) and the second sheet part (12), forms a plurality of bonding parts that regulate positions of the rubber thread (14) in a stretching direction, and makes an angle difference between a pressure angle position and a supply angle position equal to or below an angle difference between the pressure angle position and a bonding angle position.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2020,JPO&INPIT【課題】外周面が凹凸面である圧着ローラーと圧着部とを用いてシートの接合部を形成する際に、糸ゴムの切断を抑制すること。【解決手段】凹凸面である圧着ローラー(25)の供給角度位置において糸ゴム(14)を供給し、圧着ローラー(25)とプレスローラー(23)との間に第1シート部(11)及び糸ゴム(14)を通し、圧着ローラー(25)と圧着部(26)との間に、糸ゴム(14)を介在させた第1シート部(11)及び第2シート部(12)を通し、第1シート部(11)と第2シート部(12)とを接合するとともに、糸ゴム(14)の伸縮方向の位置を規制する複数の接合部を形成し、押圧角度位置と供給角度位置との角度差は、押圧角度位置と接合角度位置との角度差以下とする伸縮性シート(10)の製造方法。【選択図】図4