The characteristics of electrochemical treatment of dye wastewater by IrO2/Ti electrode were studied. Textile industry is considered as one of the most polluting sectors in terms of effluent composition and volume of discharge. Effluents from textile industry are not only colored but also contain high amounts of organic compounds and dissolved solids. Especially, the azo dyes form the largest polluting group among the synthetic pigments. The electrochemical processes are compact and simple, and the rate of pollutants removal is very rapid compared with the other wastewater treatment processes. The removal of dye wastewater containing CI Direct blue 15 was studied by electrochemical treatment process.