A solid electrolyte, all-solid secondary battery using the same, a method of manufacturing a solid electrolyte, and a manufacturing method of the all-solid-state secondary battery

The present invention aims a solid electrolyte which allows stable cell operation, to provide all-solid secondary battery using the same. The present invention comprises a positive electrode, a negative electrode, a lithium located between the said positive electrode negative electrode, aluminum, phosphorus, and the amorphous solid electrolyte film containing oxygen element, for all solid state secondary battery or the like having .