There is provided a method of producing an all-solid-state battery 100, the method including: preparing a structure 60 that includes, in the following order, a first exterior member 10, a first resin layer 20, a cell laminate 30, a second resin layer 40, and a second exterior member 50; and applying pressure to the structure 60 in a thickness direction of the structure 60, at a temperature at which the first resin layer 10 and the second resin layer 20 melt or soften.