PROBLEM TO BE SOLVED: To provide a dental lithium silicate glass composition capable of providing dental lithium silicate glass ceramics in which a main crystal (lithium disilicate and/or lithium metasilicate) can be efficiently precipitated even after the heat treatment.SOLUTION: According to the present invention, there is provided a dental lithium silicate glass composition free of AlOthe composition comprising 60.0 to 80.0 wt% of SiO, 10.0 to 17.0 wt% of LiO, 0.5 to 10.0 wt% of KO, 0.0 to 5.0wt% of ZrO, 1.0 to 6.0 wt% of a nucleation material, 0.0 to 8.0 wt% of a glass stabilizer, and 0.0 to 10.0 wt% of a colorant.SELECTED DRAWING: Figure 5【課題】熱処理後においても効率良く主結晶（二ケイ酸リチウム及び／又はメタケイ酸リチウム）を析出させることができる歯科用ケイ酸リチウムガラスセラミックスを提供可能な歯科用ケイ酸リチウムガラス組成物を提供する。【解決手段】SiO2：60.0～80.0 wt%、Li2O：10.0～17.0 wt%、K2O：0.5～10.0 wt%、ZrO2：0.0～5.0wt%、核生成材：1.0～6.0 wt%、ガラス安定化材：0.0～8.0 wt%、着色材：0.0～10.0 wt%、を含み、Al2O3を含まない歯科用ケイ酸リチウムガラス組成物。【選択図】図５
