A method for producing silica brick comprising firing a siliceous stone material containing silica as a main component is disclosed, in which 0.05 to 0.25% by weight of Na2O-CaO-SiO2 fused and solidified material and 0.1 to 1.0% by weight, in terms of Fe2O3, of iron oxide are added to the siliceous stone material, before firing. Transformation of silica into tridymite is effectively accelerated to provide silica bricks mainly comprising tridymite with reduced contents of residual silica and amorphous glass and exhibiting improved creep resistance.
