The present invention relates to a functional health band, including a health band unit configured to have a first pocket formed at a center of a body, wherein the first pocket has an opening having a rear side thereof opened, and to have first and second fastening units provided at both ends of the body and a main body inserted into the first pocket in attachable and detachable manners and configured to comprise a low frequency generation unit for generating a low frequency and a heat generation unit for generating hot heat. If sweat is soaked in or alien substances are adhered to the health band unit after the functional health band is used for a specific duration of time, the main body can be separated from the health band unit and washed sanitarily.
