PROBLEM TO BE SOLVED: To provide a rough surface forming roller whose friction coefficient is high, productivity is improved, and cost is low, and a rough surface forming apparatus, a rough surface wire, and a rough surface forming method.;SOLUTION: The rough surface forming roller 10 having a rough surface on the surface of a wire W comprises: a roller main body 11 having a rotary shaft hole 11A to provide a rotary shaft 22 at the center thereof; a groove part 12 having at least one groove 12A which comes into contact with the wire W and provided in an annular manner along the outer circumferential surface of the roller body 11; and a plurality of sharp projection parts 13 which are provided to the groove surface 12B of the groove 12A to form the rough surface on the wire W.;COPYRIGHT: (C)2006,JPO&NCIPI
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