PURPOSE: A rehabilitation treatment apparatus using a walking assistant robot is provided to allow a user to walk correctly as much as the user intends and to perform rehabilitation treatment by electronically stimulating the corresponding location of a paralyzed leg with an electromyographic signal obtained from a normal leg. CONSTITUTION: A rehabilitation treatment apparatus using a walking assistant robot comprises: an electromyographic sensor which senses the electromyography signal of muscles of a normal leg; a pressure sensor which senses a stepping pressure by being installed on the sole of the normal leg; an electromyography-type fuzzy controller(170) which fuzzifies a membership function generated according to a fuzzy rule by using the electromyographic signal input from the electromyographic sensor; a pressure-type fuzzy controller(171) which fuzzifies a membership function generated according to a fuzzy rule by using a pressure signal input from the pressure sensor; a subtractor(172) which outputs an error value by subtracting the output phase; a location- and a speed-type fuzzy controller(173,174) which fuzzifies the location and the speed control by inputting the error; a weighted value synthesizer(175) which synthesizes and outputs the result of applying weighted value for a control input, which is output from the electromyography-type fuzzy controller, the pressure-type fuzzy controller, and the location- and speed-type fuzzy controller; a neural network controller(177) which controls the speed and the location value sensed from the first servo motor to be minimized; an FES (functional electrical stimulator,179) which supplies the signal to the paralyzed leg after the time for one step elapses; a delay unit(178) which delays the time for one step; and a second servo motor for the walking assistant robot mounted on the paralyzed leg. [Reference numerals] (150,250) Submotor; (170) Electromyography-type fuzzy controller; (171) Pressure-type fuzzy control