The present invention pertains to a glass characterized by: containing 72-82% of Li + , 0-21% of Si 4+ , and 0-28% of B 3+ in terms of cation%; and containing at least 70% and less than 100% of O 2- and more than 0% and at most 30% of Cl - , containing at least 94% and less than 100% of O 2- and more than 0% and at most 6% of S 2- , or containing at least 64% and less than 100% of O 2- , more than 0% and at most 30% of Cl - , and more than 0% and at most 6% of S 2- , in terms of anion%.