A method of manufacturing a non-alkali glass

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Disclosed is a method for producing a highly uniform and highly flat alkali-free glass which has only a few bubbles therein. Specifically disclosed is a method for producing an alkali-free glass, wherein a glass raw material containing a silicon source, an alkaline earth metal source and a boron source is melted and molded. This method for producing an alkali-free glass is characterized in that a material containing 15-100% by mole (in terms of MO, and hereinafter M represents an alkaline earth metal element) of a hydroxide of an alkaline earth metal relative to 100% by mole (in terms of MO) of the alkaline earth metal source is used as the alkaline earth metal source.