PROBLEM TO BE SOLVED: To provide a glass, referred to as a neutral glass, having high transparency, good mechanical properties, low permeability and good chemical durability used preferably in a pharmaceutical field.SOLUTION: The invention provides a low-boron zirconium-free glass having a composition in the range shown in the figure. The content of BOis preferably 3-6.5 mass%, and further preferably 3.5-5.5 mass%.SELECTED DRAWING: None【課題】製薬分野において好ましく使用される、ニュートラルガラスと呼ばれる、高い透明性、良好な機械的特性、低い透過性、良好な化学的耐久性を兼ね備えたガラスの提供。【解決手段】低ホウ素でかつジルコニウム不含の、下記に示す範囲の組成を有するガラス。B2O3の含有量が好ましくは3~6.5質量%、より好ましくは3.5~5.5質量%であるガラス。【選択図】なし