To prevent the collapse of winding or floating between a film and releasing paper when traverse-winding a film tape with the releasing paper.

The film tape 10 with the releasing paper wound out from a textile stuff and cut to have 4 mm width or 5 mm width by a slitter is wound around a core by a winding portion 130 through guide rollers 111, 112, 113, 114. At the time of winding, linear pressure is made to be 1,000 g, and winding tension is 36.5-486 g, and feeding width is 0.1-4.0 mm.