Problem to be solved: to provide a seat fixing rail for a simple construction capable of facilitating connection work in series.A seat fixing rail 10 attached to a bar like member of a simple construction constructed by a member including a plurality of rod-shaped members and covered with at least a portion of the surface isPart of the sheetHaving a fixed groove 11 into which a linear spring fixing this part is insertedThis fixed grooveBottom wall 12 andA pair of curved portions 13 formed in a curved shapeFormed of a pair of sidewall portions 14;In the length direction,Connection bottom wall 62 andA pair of connection curves 63 andFormed of a pair of connection side walls 64;Among theseAt least, a connection coupling portion 60 having a shape in which the connection curved portion and the connection side wall are reduced to the inside of the fixed groove with respect to the curved part and side wall are provided.An edge portion 64a opposite to the connection bend at the connection side wall portionIt is inclined in the direction closer to the connecting bottom wall portion extending toward the tip 60A of the compression coupling end portion.Selection diagram【課題】直列の連結作業を容易に行える簡易型構築物のシート固定用レールを提供する。【解決手段】複数の棒状部材を含む部材で構築されて表面の少なくとも一部にシートが被せられる簡易型構築物の棒状部材に取り付けられるシート固定用レール10は、シートの一部と、この一部を固定する線状スプリングとが挿入される固定溝11を有し、この固定溝は、底壁部12と、湾曲状に形成された一対の湾曲部13と、一対の側壁部14とを含んで形成され、長さ方向の端部には、接続底壁部62と、一対の接続湾曲部63と、一対の接続側壁部64とを含んで形成されていて、これらのうち、少なくとも接続湾曲部と接続側壁部とが湾曲部と側壁部とに対し固定溝の内側へ縮小した形状となっている縮形連結端部60が設けられ、接続側壁部における接続湾曲部とは反対側の端縁部64Aが、縮形連結端部の先端60A側へ延びるにしたがい接続底壁部に近づく方向に傾斜している。【選択図】図13