Disclosed is an apparatus for manufacturing an electrode or a solid electrolyte for an all-solid-state battery. The apparatus for manufacturing an electrode or a solid electrolyte for an all-solid-state battery includes a first roller member configured to press an electrode or a solid electrolyte for an all-solid-state battery, and a second roller member located to be spaced apart from the first roller member to press the electrode or the solid electrolyte for an all-solid-state battery. The first roller member and the second roller member are disposed at opposite locations based on the electrode or the solid electrolyte for an all-solid-state battery.