Abstract: A glass cloth includes warp yarns and weft yarns formed by bundling in the range of 14 to 55 glass filaments having a diameter in the range of 3.0 to 4.2 ?m, and has a weaving density of the warp yarns and the weft yarns of 86 to 140 yarns/25 mm, a thickness of 7.5 to 12.0 ?m, a mass of 6.0 to 10.0 g per m2, and an average number of stages of 2.00 or more and less than 3.00, an average degree of opening, which is indicated as the geometric mean of the degree of opening of the warp yarns and the degree of opening of the weft yarns, in the range of 1.000 to 1.300, and a yarn width ratio, as the ratio of the yarn width of the warp yarns to that of the weft yarns, in the range of 0.720 to 0.960.

Abstract: A glass cloth includes warp yarns and weft yarns formed by bundling in the range of 14 to 55 glass filaments having a diameter in the range of 3.0 to 4.2 ?m, and has a weaving density of the warp yarns and the weft yarns of 86 to 140 yarns/25 mm, a thickness of 7.5 to 12.0 ?m, a mass of 6.0 to 10.0 g per m2, and an average number of stages of 2.00 or more and less than 3.00, an average degree of opening, which is indicated as the geometric mean of the degree of opening of the warp yarns and the degree of opening of the weft yarns, in the range of 1.000 to 1.300, and a yarn width ratio, as the ratio of the yarn width of the warp yarns to that of the weft yarns, in the range of 0.720 to 0.960.