Solid Electrolyte Laminate, Solid-State Secondary Battery, and Method for Manufacturing Same

A solid electrolyte laminate is capable of realizing a solid-state secondary battery capable of suppressing a short circuit during charging with a large amount of current and/or suppressing a decrease of a battery capacity even when a charge and discharge cycle is repeatedly performed. A solid electrolyte laminate in which three or more electrolyte layers containing a solid electrolyte are laminated, comprising a first electrolyte layer having a support, and a second electrolyte layer and a third electrolyte layer disposed so as to sandwich the first electrolyte layer and having no support, in which a film thickness of the second electrolyte layer is 1.5 to 5 times as large as a film thickness of the third electrolyte layer.