The present invention relates to a transcranial direct current stimulation apparatus, which is a medical device using a non-invasive nerve stimulation method, and more specifically, to a transcranial direct current stimulation method of which a purpose is to conveniently and effectively use a personal transcranial direct current stimulation apparatus and to exclude side effects, and implementation of an electrode system of the personal transcranial direct current stimulation device. To this end, the personal transcranial direct current stimulation apparatus of the present invention comprises: a stimulation contact unit consisting of a plurality of electrodes which are in contact with a region of a head of a user an electrode fixing unit consisting of two joints in order to attach each electrode of the stimulation contact unit to the head of a user a control unit for determining polarity of the electrodes of the stimulation contact unit, and adjusting a direct current corresponding to each of the electrodes and a stimulation generation unit for generating stable direct current corresponding to the polarity of each electrode determined in the control unit. Particularly, the personal transcranial direct current stimulation apparatus changes a current stimulation of the stimulation generation unit to a false stimulation when a stimulation use time of the user is examined through the control unit and excessive use is sensed. Accordingly, the personal transcranial direct current stimulation apparatus uses the stimulation contact unit having a plurality of electrodes of which polarity can be converted and the electrode fixing unit using two joints, thereby providing a method that a user can easily fix stimulation electrodes to a head thereof. Also, the personal transcranial direct current stimulation apparatus controls the stimulation generation unit by using the control unit, wherein, when excessive use is sensed, a false stimulation is supplied to protect the user from s
