PROBLEM TO BE SOLVED: To provide a film member assembly which has a flexible joint and excellent handleability, of which the joint is scarcely wrinkled even when tension is applied thereto, and in which warpage and waving due to heat in joining are scarcely produced.SOLUTION: An assembly is formed by arranging film members in such a way that their end faces abut on each other, and by sticking a tape-like joining member to the film members across their abutting section by thermal fusion bonding so as to join a plurality of film members with one another. The film member has a base fabric 1 composed of a fibrous knitted fabric and a thermoplastic resin coating layer to coat at least one face of the base fabric 1, the base fabric 1 includes warp and weft orthogonal to each other, in addition the tape-like joining member has a base fabric 2 composed of the fibrous knitted fabric and a thermally fusible resin layer arranged on at least one outermost layer, the base fabric 2 includes axial fibers in two or three dir
