To prevent a sprinkly colored state from occurring at the time of dyeing and printing a flame retardant woven fabric containing cellulosic fibers specified in warp yarns and flame retardant fibers specified in weft yarns without deteriorating performances such as flame retardance.

This flame retardant woven fabric is combining and weaving yarns prepared by mix spinning of 60-90 pts.wt. halogen-containing fibers containing an Sb compound in an amount of 6-50 wt.% based on a polymer containing 17-70 wt.% halogen in the polymer with 10-40 pts.wt. cellulosic fibers so as to provide 100 pts.wt. sum total thereof as weft yarns with warp yarns of 100 wt.% cellulosic fibers in a satin weave. Since the cellulosic fibers compounded with halogen-containing fibers prepared by highly intensifying the flame retardance with a flame retardant have hitherto been used as the weft yarns containing only the flame retardance used therein and formed into a union cloth with warp yarns composed of the cellulosic fibers, the woven fabric having the flame retardance without providing a sprinkly colored state at the time of dyeing or printing is obtained.