PROBLEM TO BE SOLVED: To provide a critical current measuring device for a superconductive wire material that can stably measure Ic of the superconductive wire material by properly preventing ice grains from being mixed when measuring Ic of the superconductive wire material in a four-terminal method.SOLUTION: There is provided a critical current measuring device for a superconductive wire material that measures a critical current of the superconductive wire material in a four-terminal method. The critical current measuring device for the superconductive wire material includes: a cooling tank in which a liquid refrigerant is stored; a pair of voltage electrodes for measuring a voltage of the superconductive wire material located in the liquid refrigerator in the cooling tank; a pair of current electrodes provided outside the pair of voltage electrodes so as to supply a current to the superconductive wire material; and a carrying mechanism which carries the superconductive wire material into the liquid refriger
