To provide a lithium battery and a lithium secondary battery each using silicon or an alloy mainly containing silicon for a negative electrode active material and an ion conductive solid electrolyte as an electrolyte, each having sufficient charge/discharge capacity and charge/discharge cycle property.

Each of the lithium battery and the lithium secondary battery comprises a positive electrode, a negative electrode and the ion conductive solid electrolyte. Silicon or the allow mainly containing silicon is used for the negative electrode active materials 2, 14 and a first mixture layer 16 is formed of the active material containing a component contained in the solid electrolyte, on an interface where the negative electrode active material and the solid electrolyte contact each other.