To provide a cord winding method capable of winding a cord accurately, a winding device and a manufacturing method for a transmission belt.

A core wire 10 is fixed to at least one of a pair of left and right cylindrical rolls 21a and 21b arranged centering around the rotary shaft 23 of a rotatable support member 22. Thereafter, a pair of the cylindrical rolls 21a and 21b are revolved by rotating the support member 22 to spirally wind the core wire 10 around a pair of the cylindrical rolls 21a and 21b while moving the cylindrical rolls 21a and 21b in an axial direction.