Abstract : Electrocutaneous stimulation using electric pulse trains is one of the most effective cutaneous displays for tactual communication systems. This paper deals with the human operator's characteristics in compensatory manual tracking system including an electrocutaneous display. Firstly, an electrocutaneous manual compensatory tracking system -- which consists of a random noise generator, a low-pass filter, a multichannel stimulator, a stimulus pulse energy controller, an isolator and a computer -- was constructed. Secondly, human operator's characteristics under several parameter situations in a compensatory tracking system (i.e., display transformation method, display gain, and pulse frequency) were evaluated from Root Mean Square values (RMS) of control errors and transfer functions of human operators. Thirdly, differences between human operator's control performance in various cutaneous and visual tracking displays were discussed. As a result, the optimal condition for an electrocutaneous display in a tracking control system was presented and human operator's control performance in electrocutaneous manual tracking system was found to be as good as that in vibro-tactile though inferior to that in visual.