Abstract: Provided is a glass fiber-reinforced resin molded article including low dielectric constant and particularly low dielectric loss tangent, in a high-frequency region of 10 GHz or more. The glass fiber-reinforced resin molded article contains glass fiber in the range of 10 to 90% by mass and a resin in the range of 90 to 10% by mass with respect to the. total amount of the glass fiber-reinforced resin molded article. The glass fiber includes a composition including 52.0 to 59.5% by mass of SiO2, 17.5 to 25.5% by mass of B2O3, 9.0 to 14.0% by mass of Al2O3, 0.5 to 6.0% by mass of SrO, 1.0 to 5.0% by mass of MgO, 1.0 to 5.0% by mass of CaO, and 0.1 to 2.5% by mass of F2 and Cl2 with respect to the total amount of the glass fiber, and a number average fiber length is 1 to 10000 ?m.

Abstract: Provided is a glass fiber-reinforced resin molded article with high mechanical strength and in which occurrence of undispersion of glass fiber is suppressed. In the glass fiber-reinforced resin molded article, glass fiber includes a flat cross-sectional shape having a minor axis D1 in the range of 3.0 ?m or more and 10.5 ?m or less and a major axis D2 in the range of 11.0 ?m or more and 29.0 ?m or less, the number average fiber length L (?m) of the glass fiber included in the glass fiber-reinforced resin molded article is in the range of 195 ?m or more and less than 400 ?m, the glass fiber content C (wt %) in the glass fiber-reinforced resin molded article is in the range of more than 50.0 wt % and 80.0 wt % or less, and the D1, D2, L, and C satisfy the following formula (1): 1200.0?C×L2/(D1×D22)?2550.0 ??(1).