A structure for connecting high-temperature superconducting wire materials according to an embodiment comprises: a first superconducting wire material 3 and a second superconducting wire material 4, each of the two high-temperature superconducting wire materials comprising a band-shaped base material 1 made of metal or alloy, and an oxide superconducting layer 2 formed on an upper surface of the base material 1; and a joint portion 6 comprising a superconducting connection portion 5 formed between the first and second superconducting wire materials 3, 4 by joining the first and second superconducting wire materials 3, 4 together in a positional relationship such that the upper surfaces of the first and second superconducting layers 2, 2, which are the respective oxide superconducting layers of the first and second superconducting wire materials 3, 4, are opposed to each other. In the same base material 1 of the superconducting wire material 3 of at least one of the first and second superconducting wire materials 3, 4, a first portion 7 constituting the joint portion 6 is thicker than a second portion 8 that does not constitute the joint portion 6.
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