A rotator coil is provided that includes a coil conductor and a mica tape wound a plurality of times around an outer periphery of the coil conductor. The mica tape includes mica paper and a reinforcing member, and has an adhesive resin layer containing an acryloyl-based component and a cyanate ester-based component between the mica paper and the reinforcing members. The reinforcing member, the mica paper, or both, are impregnated with a thermosetting resin composition, and hardened.