An electrotherapy insole apparatus comprises an electrotherapy device and an insole. The electrotherapy device provides the electrotherapy stimulation and/or heat to the insole, and the insole contacts the foot of a user for the electrotherapy. The electrotherapy device attaches to and detaches from the insole. This allows the user to wash the insole if necessary. Also, this allows the user to replace the insole if necessary, providing an affordable replacement of insole and a long use of the electrotherapy device. The integrated circuit board inside the electrotherapy device is powered by the rechargeable battery or similar power source.
