PURPOSE: To make it possible to connect a film body simply and what is more, firmly.

CONSTITUTION: A connection-side end of a film body 10 is wound with a string 12 and folded, thereby forming an engagement unit 14. A tie-film 16 is branched in the shape of fork on the top of the connection end of the film substance 10 and fusion- bonded. A receiving material 18 is formed by a specified length where two strips of cross section-substantially semicircle-shaped lower part grooves, which fit in the engagement unit 14, are formed in parallel on the top. A presser member 20 is formed in long length where two strips of cross section-substantially semicircle-shaped upper part grooves, which fit in the engagement unit 14, are formed in parallel on the bottom. The connection between the film body 10, 10 is made when the engagement unit 14 is fitted into the lower part groove 22 of the receiving member 18 while the presser member 20 is laid out in such a fashion that the engagement units 14, 14 are fitted into the upper part grooves 28 in the upper part of the receiving member 18. The connection ends of the film substances 10, 10 are clamped between the receiving member 18 and the presser member 20. A bolt 24 is inserted into bolt insertion holes 26 and 32 of the receiving member 18 and the presser member 20 from above and a nut 32 is screwed into the lower end of the bolt 24 and fastened.