PROBLEM TO BE SOLVED: To easily and efficiently impart functions, such as antimicrobial properties, weathering resistance or water repellence, to the surface of glass in a continuous manufacturing stage for the glass. SOLUTION: The surface modifying method for the glass comprises spraying liquid for surface modification to the surface of the continuous glass body without generating cracks in the glass body in a slow cooling stage of the continuous manufacturing stage for the glass for manufacturing the product glass by continuous melting, forming, slow cooling and processing of the glass.