PURPOSE: A glass fixing device for a protective wall is provided to vertically support and fix glass for a protective wall with respect to the ground and to prevent deformation of the glass for the protective wall. CONSTITUTION: A glass fixing device(1) for a protective wall comprises a support plate(10), a pair of support columns(20), and a plurality of fixing units(30). The support plate is installed in a foundation member(5), thereby fixing glass for a protective wall(3) at a predetermined position. The pair of support columns is vertically installed in the upper part of the support plate to be parallelly spaced from each other. The plurality of fixing units is respectively installed in each support column in a longitudinal direction of the support columns. The plurality of fixing units fixes and supports the glass for the protective wall.
