To provide a method of packing synthetic fiber bundles wherein curls (cold-setting) occurring during packing and transportation can be minimized to prevent workability and cosmetic characteristics from degrading, and to provide a synthetic fiber bundle for a wig.

The method comprises a step of packing the synthetic fiber bundles in a circle with a radius of curvature of 35 mm or more when casing the bundles. The synthetic fiber bundle has an average weaving degree of a single fiber in the bundle of 35 to 85 dtex, and a coefficient of a curl of the fiber when cut for use is 0.25 or less.