SOLID-STATE BATTERY

A solid-state battery that includes a negative electrode layer and a solid electrolyte layer. The negative electrode layer contains a negative electrode active material in which a molar ratio of Li to vanadium (V) is 2.0 or more, the solid electrolyte layer contains a solid electrolyte having a lithium super ionic conductor (LISICON)-type structure and containing at least V, and the solid electrolyte contained in the solid electrolyte layer has an average chemical composition represented by (LiA)(VB)O.