We have developed the systems to feed pressure in the cuff back into users who use a myoelectric hand. In our system, the cuff is wrapped around the user’s arm. This system can control pressure in the cuff at high speed by using two tanks. Advance one tank is applied pressure on and the other is decompressed. In this time, we control pressure in the cuff by using motors and servo valves. We gauge compliance of pressure in the cuff when we input reference signals.