To provide a footbath device uniformly retaining the temperature inside an inner vessel and providing a uniform hot bath effect.

This footbath device is provided with the inner vessel 3 having an insertion opening 2 in its upper face, a detachable liquid tank 5, a vaporizer 7 vaporizing the liquid 6 in the liquid tank 5 by being heated by a heater 8 and jetting it out from an outlet A11 to the inside of the inner vessel 3, a pump 9 sending the liquid 6 to the vaporizer 7, and a footrest stand 13 covering the bottom part 3a of the inner vessel 3 and having projecting/recessed parts 14 and multiple holes 15 on its surface. The outlet A11 of the vaporizer 7 faces a space part 16 formed of the bottom part 3a inside the inner vessel 3 and the footrest stand 13.