a continuous glass cloth comprising a plurality of glass cloth pieces which are joined together has joints between adjacent glass cloth pieces which are of greatly reduced thickness as compared to conventional glass cloths . the joints comprise end portions of the glass cloth pieces which are to be joined together , overlapping by at least one joining member , with a thermoplastic resin located between the joining member and the end portions of the glass cloth pieces . the thermoplastic resin bonds the joining member to the end portions , without the necessity for the end portions to overlap one another .