A glass ceramic substrate contains a glass ceramic having a compressive stress layer on a surface thereof and a crystalline phase containing LiAlSi.sub.4O.sub.10, quartz, and quartz solid solution. The glass ceramic has 60 to 80% of SiO.sub.2, 4 to 20% of Al.sub.2O.sub.3, more than 0 but less than or equal to 15% of Li.sub.2O, more than 0 but less than or equal to 12% of Na.sub.2O, 0 to 5% of K.sub.2O; more than 0 but less than or equal to 5% of ZrO.sub.2, 0 to 5% of P.sub.2O.sub.5, and 0 to 10% of TiO.sub.2. The quartz and the quartz solid solution crystalline phase account for 15 to 30% of the glass ceramic by wt %, the LiAlSi.sub.4O.sub.10 crystalline phase accounts for not greater than 15% of the glass ceramic by wt %, and a ratio of ZrO.sub.2/Li.sub.2O is more than 0 but less than or equal to 0.35.