An insoluble anode for metal wire electroplating capable of simultaneously electroplating a plurality of metal wires and uniformalizing the electroplating amounts of the metal wires stably for a long time. For realizing these, a plurality of insoluble electrode plates are disposed in a parallel alignment to be placed sandwiching a plurality of wire travel paths from both sides. A plurality of the insoluble electrode plates are tightened and fixed by through-bolts at a plurality of places along the travel path direction. A conductive spacer is interposed in each gap between the insoluble electrode plates at a tightening part by the through-bolt and also a conductive member is provided so as to contact all the electrode plates and the conductive spacers.