To provide a spiral steel wire that is formed by spirally forming a brass-plated steel wire and has excellent corrosion fatigue resistance, a method for producing a spiral steel wire, a rotating apparatus for spiral forming, a steel cord for reinforcing a rubber article using the spiral steel wire and a tire.

In the rotating apparatus 14a for spiral forming in which a brass-plated steel wire 10c that is pulled from one side to the other and extended linearly is formed into a spiral steel wire 10d and in the rotating apparatus 14a for spiral forming, which is equipped with a rotator 14b in which a rotary central shaft P is set in parallel with the pulling direction Q of the brass-plated steel wire 10c and a forming part 14d composed of a plurality of forming pins 14c that are implanted in the pulling direction and zigzag on the outer peripheral surface of the rotator 14b so as to hang the brass-plated steel wire 10c to meander, the plurality of the forming pins 14c are implanted rotatably in the pulling direction Q through bearings 14e, respectively, so that a residual circumferential stress amount Rs of surface layer part of the spiral steel wire 10d is turned into a compressive stress.