The invention relates to a self-support supercapacitor free of a metallic current collector. The capacitor adopts bucky paper as positive electrode and negative electrode active materials; the mass ratio of a positive plate to a negative plate is 1.0-1.3:1; the positive plate and the negative plate are coated with a conductive binder separately, and tabs are carefully led out of the positive plate and the negative plate; a supercapacitor cell is assembled based on the sequence of the positive electrode-a diaphragm-the negative electrode; and finally the supercapacitor cell is filled with an electrolyte and is packaged to obtain the single supercapacitor. The supercapacitor provided by the invention is simple to prepare, low in internal resistance, high in charge/discharge efficiency, and free of occupied space and quality of the current collector; and the self-support supercapacitor can be widely applied to the electronic industry.