Discharge machining electrode wire, and a manufacturing method thereof

To provide a discharge machining electrode wire and a manufacturing method thereof excellent automatic wire connection of the time of electric discharge machining in electrical discharge machining electrode wire having a zinc coating on the outer periphery of the core. Discharge machining electrode wire 10 is covered the outer periphery of the core member 1 made of copper or a copper alloy with a coating layer 2 including zinc, the coating layer 2, copper covers the outer periphery of the core 1 - zinc and the inner layer 2A containing γ phase of the alloy, copper covering the outer periphery of the inner layer 2A - and a layer 2B containing e-phase zinc alloy, the e-phase (0001) X-ray diffraction intensity, of the γ-phase ( 332) is greater than 2 times the X-ray diffraction intensity.