A superconducting coil, includes a coil body around which a superconducting wire is wound; an electrode member which includes a first surface, a second surface, a base portion, and an extension portion, the first surface facing an outer peripheral surface of the coil body, the second surface being positioned to be opposite to the first surface, the base portion being solder-joined to the superconducting wire of the coil body on the first surface, the extension portion extending from the second surface to the outside of the coil body, and an electrode superconducting wire which extends from the second surface of the electrode member toward the extension portion, and is solder-joined to the base portion and the extension portion.