An all-solid-state secondary battery includes a positive electrode having a positive electrode active material layer, a negative electrode having a negative electrode active material layer, and a solid electrolyte layer between the positive and negative electrode active material layers. The solid electrolyte layer has a thickness of 2 to 20 μm. The solid electrolyte layer includes a binder containing a particulate polymer having an average particle diameter of 0.1 to 1 μm.