The present invention pertains to a glass characterized by: containing 72-82% of Li+, 0-21% of Si4+, and 0-28% of B3+ in terms of cation %; and containing at least 70% and less than 100% of O2− and more than 0% and at most 30% of Cl−, containing at least 94% and less than 100% of O2− and more than 0% and at most 6% of S2−, or containing at least 64% and less than 100% of O2−, more than 0% and at most 30% of Cl−, and more than 0% and at most 6% of S2−, in terms of anion %.