To assure the excellent winding of film while eliminating flaws formed in an inner surface of a flange of a spool by providing a pair of spool members complemented to each other, and forming each spool member of a cylindrical part and a flange having an inward annular surface and an outward annular surface.

A spool 100 is formed of two spool members 112, 114 having a complementary shape to each other, and each spool member 112, 114 is provided with a flange 16 having an outward annular surface 118 and an inward annular surface 120. In the inward annular surface 120, an annular recessed part 126 and an inclined transference part 128 are formed in a space between the outer peripheral surface 122 and the inner peripheral surface 130. Each spool member 112, 114 has a cylindrical core part 132 near the corresponding flange 116, and an opposite end to the flange 116 is integrally formed with an engagement piece 134 provided with a lock part 154 at a tip of the extension part so as to be engaged with a corresponding groove part of the cylindrical core part 132 for lock.