PROBLEM TO BE SOLVED: To provide an eddy current bath device which can be easily used.SOLUTION: An eddy current bath device 1 for generating an eddy current in a bathtub 10 for stimulating an affected part comprises a bathtub lid 2. The bathtub lid 2 comprises an opening through which the affected part is put into the bathtub 10 from outside. The bathtub lid 2 may comprise a stationary part 23 for fixing a waterproof tool 3 for preventing a body part to be put into the bathtub 10 through the opening, from getting wet.SELECTED DRAWING: Figure 5