All-solid battery and a manufacturing method thereof

Providing all-solid-state battery manufactured by the manufacturing method and how the all-solid-state battery capable of suppressing the internal short circuit of the all-solid-state battery. Of the laminate of the all-solid-state cell (10), to produce a laminate of at least one unit cell, first, it is at least one of the green sheets of the positive electrode layer (1) or negative electrode layer (3) a first green sheet, after forming a second green sheet is a green sheet of the solid electrolyte layer (2), a laminate formed by laminating the first green sheet and the second green sheet and firing the laminate by disposing a setter so as to contact at least one side surface of the laminate. In the baking step, the surface roughness of the setter in contact with at least one side surface of the laminate is less than 50.13μmRa least 0.11MyumRa.