To provide a simple footbath unit which allows a user to easily soak his/her feet in a plurality of water tubs holding water each different in temperature and element quality without moving his/her seat position.

This footbath unit comprises at least two adjacent water tubs 11 and 12 for footbath and a seat 30 which allows a user to soak his/her feet in the water tubs 11 and 12 while sitting on substantially the same position. One of the water tubs 11 and 12 for footbath is used as a warm water tub 21 holding warm water, and the other is used as a cool water tub 22 holding water lower in temperature than the warm water tub 21.