The invention provides a corrugated sheet fastening line fastening structure capable of economically and rationally increasing the tensile strength by devising the fastening method of the corrugated sheet fastening line on the adding side. An end portion of a corrugated sheet retaining line 1 that has been secured in advance into the sheet securing groove 10a of a sheet securing material 10 having a sheet securing groove 10a having a narrow opening portion corresponds to at least a half wavelength. The leading end portion of the retrofitting corrugated sheet retaining line 1 'is pushed into the sheet securing groove 10a and secured. [Selection] Figure 1【課題】継ぎ足す側の波形シート止め線の止着手法に工夫を施すことにより、経済的かつ合理的に引張強度を高めることができる波形シート止め線の止着構造を提供する。【解決手段】開口部が幅狭のシート止着溝１０ａを有するシート止め材１０のシート止着溝１０ａ内へ先行して止着した波形シート止め線１の端末部において少なくとも１／２波長相当の長さ部分をラップさせて後付け波形シート止め線１’の先端部分をシート止着溝１０ａ内へ押し込み止着されている。【選択図】図１
