Degradation of anthraquninone dye C.I. Reactive Blue 19 (RB19) via generated ozone by electrochemical oxidation process was investigated in this research. Ti/Sn-Sb-Ni electrode was used as an anode for ozone generation. The anode electrode was characterized electrochemically by cyclic voltammetry and characterized morphologically by scanning electron microscopy and X-ray diffraction. The amount of ozone concentration and RB19 degradation increased with increasing of applied voltage, electrolysis time, and in 1 M HClO4 at room temperature. The results of UV/Vis spectroscopy showed that the anthraquinone structure was degraded by dissolved generated ozone and also intermediate compounds were detected by integrated gas chromatography-mass spectrometry (GC/MS). Removal of color and COD were 100 % after 3 min and 48.2 % after 15 min reaction time, respectively.