[Problem] To provide: a lithium composite negative electrode which allows a hybrid capacitor to operate at room temperature by reducing interface resistance in the electrode; a hybrid capacitor provided with said composite negative electrode; and manufacturing methods thereof. [Solution] The aforementioned problem was solved by a lithium composite negative electrode 12 which is a layered electrode formed of a lithium ion-conducting solid electrolyte 23, an alginate gel electrolyte 22, and lithium-doped carbon 21. Furthermore, in order to solve the aforementioned problem, a hybrid capacitor 1 is provided with at least: a positive electrode 11 having a carbon material and/or a metal oxide; the lithium composite negative electrode 12; and a neutral aqueous electrolytic solution 13 that fills the interval between the positive electrode 11 and the lithium composite negative electrode 12, wherein the lithium composite negative electrode 12 is configured as a layered electrode formed of the lithium ion-conducting solid electrolyte 23, the alginate gel electrolyte 22, and the lithium-doped carbon 21.