The present invention relates to an antimicrobial glass which can be stored into a narrow storage space in an antimicrobial water unit for providing antimicrobial water to a washing tub of a washing machine, preventing a generation of a black mold and the like effectively in the washing tub, preventing coloration for a laundry, and providing an antimicrobial effect for the laundry. The present invention provides an antimicrobial glass having the antimicrobial effect by releasing of Ag ion as getting directly contact with water, wherein when the total amount is set to be 100% by weight, the content of Ag2O exceeds 5% by weight and is a value of 10% or less by weight, the contents of P2O5 and CaO are the values within the predetermined range, the contents of ZnO is a value below 10% by weight, the contents of K2O, Al2O3, and MgO are the values within the predetermined range, and the shape of the antimicrobial glass is a tablet, the maximum length is the predetermined range.本發明提供一種抗菌玻璃，其能夠容納於用於對洗衣機的洗滌槽供給抗菌水之抗菌水部件中之狹窄容納空間內，並且能夠有效地抑制洗滌槽中之芽枝狀枝孢等的產生，且能夠抑制對被洗滌物之著色的同時使其有效抗菌。本發明係用於直接與水接觸，釋放銀離子來發揮抗菌效果之抗菌玻璃，將總量設為100重量%時，將Ag2O的含量設為超過5重量%且10重量%以下範圍內的值，將P2O5、CaO的含量設為預定範圍內的值，將ZnO的含量設為低於10重量%的值，將K2O、Al2O3、MgO的含量設為預定範圍內的值，並且抗菌玻璃的形狀為片劑狀，並且將最大直徑設為預定範圍。
