GLASS COMPOSITION AND STRENGTHENED GLASS SHEET

The present invention provides a MnO-free glass composition having a FeO ratio of 30% or less, excellent ultraviolet and near-infrared absorbing ability, and a high visible light transmittance. The present invention relates to a glass composition containing, in mass %: 71 to 78% SiO2; 0 to 5% B2O3; 1 to 5% Al2O3; 1 to 3.5% MgO; 2 to 9.5% CaO; 0 to 1% SrO; 0 to 1% BaO; 0 to 3% Li2O; 10 to 18% Na2O; 0 to 3% K2O; 0 to 1% TiO2; 0 to 1% CeO2; 0 to 0.5% SO3; and 0.6 to 1.2% T-Fe2O3, which is total iron oxide in terms of Fe2O3. This glass composition is free of MnO, the total content of TiO2 and CeO2 is 0.05% or more, the total content of Li2O, Na2O, and K2O is 12 to 18%, and the total content of MgO, CaO, SrO, and BaO is 10.5% or less.