A superconducting wire rod connection structure (100, 100A, 100D to 100M) comprising: first and second superconducting wire rods (10A, 15A, 10B, 15B), wherein, the first and second superconducting wire rods (10A, 15A, 10B, 15B) are formed by layering a base material (1, 1C, 1D), an intermediate layer (2, 2C), and a superconducting conductor layer, the base materials (1, 1C, 1D) of the first and second superconducting wire rods (10A, 15A, 10B, 15B) are joined to each other, and the superconducting conductor layers of the first and second superconducting wire rods (10A, 15A, 10B, 15B) are connected by a connection wire rod (10C, 10D, 10E), a separating portion in which connection ends of the first and second superconducting wire rods (10A, 15A, 10B, 15B) with the base materials (1, 1C, 1D) joined to each other are separated from the connection wire rod (10C, 10D, 10E), and a connection superconducting film (5, 5E) which connects the superconducting conductor layers of the first and second superconducting wire rods (10A, 15A, 10B, 15B) to a portion of the connection wire rod (10C, 10D, 10E) of the separating portion, wherein, the connection superconducting film (5, 5E) is formed between the superconducting conductor layer of the first and second superconducting wire rods (10A, 15A, 10B, 15B) and the connection wire rod (10C, 10D, 10E); characterized in that the separating portion is formed to be capable of providing oxygen to the portion in the connection superconducting film (5, 5E) facing the separating portion and the portion near connection ends of the first and second superconducting wire rods (10A, 15A, 10B, 15B); and the connection superconducting film (5, 5E) comes into contact with an end surface of a connection end side of the superconducting conductor layers of the first and second superconducting wire rods (10A, 10b) and the surface facing the separating portion of a superconducting conductor layer of the connection wire rod (10C, 10D, 10E). first and second superconducting wire rods (10A, 15A, 10B, 15B), wherein, the first and second superconducting wire rods (10A, 15A, 10B, 15B) are formed by layering a base material (1, 1C, 1D), an intermediate layer (2, 2C), and a superconducting conductor layer, the base materials (1, 1C, 1D) of the first and second superconducting wire rods (10A, 15A, 10B, 15B) are joined to each other, and the superconducting conductor layers of the first and second superconducting wire rods (10A, 15A, 10B, 15B) are connected by a connection wire rod (10C, 10D, 10E), the first and second superconducting wire rods (10A, 15A, 10B, 15B) are formed by layering a base material (1, 1C, 1D), an intermediate layer (2, 2C), and a superconducting conductor layer, the base materials (1, 1C, 1D) of the first and second superconducting wire rods (10A, 15A, 10B, 15B) are joined to each other, and the superconducting conductor layers of the first and second superconducting wire rods (10A, 15A, 10B, 15B) are connected by a connection wire rod (10C, 10D, 10E), a separating portion in which connection ends of the first and second superconducting wire rods (10A, 15A, 10B, 15B) with the base materials (1, 1C, 1D) joined to each other are separated from the connection wire rod (10C, 10D, 10E), and a connection superconducting film (5, 5E) which connects the superconducting conductor layers of the first and second superconducting wire rods (10A, 15A, 10B, 15B) to a portion of the connection wire rod (10C, 10D, 10E) of the separating portion, characterized in that the separating portion is formed to be capable of providing oxygen to the portion in the connection superconducting film (5, 5E) facing the separating portion and the portion near connection ends of the first and second superconducting wire rods (10A, 15A, 10B, 15B); and the connection superconducting film (5, 5E) comes into contact with an end surface of a connection end side of the superconducting conductor layers of the first and second superconducting wire rods (10A, 10b) and the surface facing the separating portion of a superconducting conductor layer of the connection wire rod (10C, 10D, 10E).