Manufacturing method for molten glass and manufacturing method for sheet glass using same

The present invention is a manufacturing method for molten glass which uses a molten glass manufacturing device having a melting tank for melting glass starting materials to produce molten glass, wherein the melting tank has a burner for heating the upper space of the melting tank, and a plurality of bubblers across the width direction of the molten glass passage in the vicinity of the bottom surface of the melting tank. The plurality of bubblers are positioned so as to satisfy a predetermined positional relationship with respect to the length of the molten glass passage of the melting tank, and the flow of molten glass in the melting tank produces molten glass under predetermined conditions.