The present invention relates to a device for stimulating the brain, consisting of at least one electrode, an electrode portion that moves back and forth to the head to fix the electrode to the user's head, and to the head to fix the electrode portion to the user's head. It is characterized in that the auxiliary crimping portion for moving back and forth and the electrode portion and the auxiliary crimping portion are disposed inside the donut shape, and the donut shape includes a donut-shaped support portion surrounding the head, and the electrode is brought into close contact with the head. It can be conveniently worn by the user without the need for complicated manipulation.
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