An all-solid-state thin-film battery according to an aspect of the present disclosure includes: a solid electrolyte layer; a cathode active material layer; a cathode current collector layer including a first portion and a second portion; an anode terminal layer; and an anode layer including a third portion and a fourth portion. The first contact surface between the solid electrolyte layer and the cathode active material layer, the second contact surface between the solid electrolyte layer and the first portion of the cathode current collector layer, and the third contact surface between the third portion of the anode layer and the anode terminal layer are located within a single plane.