A new rehabilitation method is under developing for the treatment of paralyses caused by stroke. This method, the paired associative stimulation (PAS), stimulates both a motor cortex of a brain and a peripheral nerve of the affective muscle in the optimum time interval. In order to stimulate the peripheral nerve effectively, a new magnetic pulse generator is developed, which controls the stimulation intensity not by the applied voltage but by the cycle number of waves. This power supply has three advantages as compared to the commercial magnetic pulse generator. (1) Compact and light weight. (2) Pulse voltage is low and fixed under 600V. (3) The stimulation intensity is controlled by the number of waves from 1 cycle to 8 cycles.