All-solid-state sodium ion secondary battery

Provided is an all solid sodium ion secondary battery in which the electrode layer is not easily peeled off from the solid electrolyte layer and which is excellent in cycle characteristics. An all solid sodium ion secondary battery 1 of the present invention has a solid electrolyte layer 2 having a first main surface 2a and a second main surface 2b facing each other, and made of a sodium ion conductive oxide, A positive electrode layer 3 provided on the first main surface 2a of the solid electrolyte layer 2 and a negative electrode layer 4 provided on the second main surface 2b of the solid electrolyte layer 2; Arithmetic mean roughness Ra on at least one of the main surface 2a and the second main surface 2b is preferably 0.05 μm or more.