An electrical stimulation device is provided. The electrical stimulation device according to one embodiment of the present inventive concept is worn on the head so as to apply electrical stimulation to the brain, and comprises: a frame to be worn on the head； an electrode structure including an electrode part formed of a conductive member and a cover unit formed of an insulating member covering at least a part of the electrode part, and of which one end is connected to the frame； and a patch detachable from the electrode structure and making contact with the head when attached to the electrode structure.
