This research has performed to study the oxidation of cyanide and recovery of copper in wastewater. The concentration of cyanide and copper reduced by 80% through the electrochemical treatment. The oxidation rate of cyanide and the recovery rate of copper increased as the hydraulic retention time and the distance between cathode and anode decreased. And, those rates were proportional to the increment of applied potential. Cathodic and anodic current efficiency however increased as the potential and the distance between cathode and anode decreased. The hydraulic retention time showed no effect on the current efficiency.