To provide a technology molding a green tire while maintaining a cord pass between right and left beads constant to improve RFV.

A bead setting ring for fixing the bead to a cylindrical material includes: a ring part; and a spacer part formed by a magnet protruding from the ring part in a ring axis direction into contact with a bead core. A protruding-side end of the spacer part is configured to attract a side surface of the bead core by magnetic force of the magnet while maintaining a non-contact state between the ring part and apex rubber. A device of molding green tire includes: the bead setting ring; and a bead lock which is adapted to fix the bead to the cylindrical material and is freely increased/decreased in diameter. A method of molding the same includes the bead locking step of fixing the bead to the cylindrical material by increasing the diameter of the bead lock in a state that the spacer part is attached to the side surface of the bead by the magnetic force.