A fuel cell, comprising: a solid electrolyte layer containing Zr; an intermediate layer containing CeO 2 solid solution having a rare-earth element excluding Ce; an air electrode layer containing Sr, the intermediate layer and the air electrode layer being stacked in this order on one surface of the solid electrolyte layer; and a fuel electrode layer on another surface of the solid electrolyte layer which is opposite to the one surface, wherein the intermediate layer comprises a first layer located on a surface of the solid electrolyte layer and a second layer formed on the first layer and located on a surface of the air electrode layer, the first layer and the second layer each contain CeO 2, characterized in that: a value obtained by dividing a content of the rare-earth element excluding Ce by a content of Zr is equal to or less than 0.05 at a site of the solid electrolyte layer, the site being 1 μm away from an interface between the solid electrolyte layer and the intermediate layer, and the content of the rare-earth element excluding Ce contained in the first layer is smaller than the content of the rare-earth element excluding Ce contained in the second layer, wherein all contents are measured through the use of Scanning Transmission Electron Microscope-Energy Dispersive X-ray Spectroscopy, STEM-EDS. a solid electrolyte layer containing Zr; an intermediate layer containing CeO 2 solid solution having a rare-earth element excluding Ce; an air electrode layer containing Sr, the intermediate layer and the air electrode layer being stacked in this order on one surface of the solid electrolyte layer; and a fuel electrode layer on another surface of the solid electrolyte layer which is opposite to the one surface, wherein the intermediate layer comprises a first layer located on a surface of the solid electrolyte layer and a second layer formed on the first layer and located on a surface of the air electrode layer, the first layer and the second layer each contain CeO 2, characterized in that: a value obtained by dividing a content of the rare-earth element excluding Ce by a content of Zr is equal to or less than 0.05 at a site of the solid electrolyte layer, the site being 1 μm away from an interface between the solid electrolyte layer and the intermediate layer, and the content of the rare-earth element excluding Ce contained in the first layer is smaller than the content of the rare-earth element excluding Ce contained in the second layer, wherein all contents are measured through the use of Scanning Transmission Electron Microscope-Energy Dispersive X-ray Spectroscopy, STEM-EDS. a value obtained by dividing a content of the rare-earth element excluding Ce by a content of Zr is equal to or less than 0.05 at a site of the solid electrolyte layer, the site being 1 μm away from an interface between the solid electrolyte layer and the intermediate layer, and the content of the rare-earth element excluding Ce contained in the first layer is smaller than the content of the rare-earth element excluding Ce contained in the second layer, wherein all contents are measured through the use of Scanning Transmission Electron Microscope-Energy Dispersive X-ray Spectroscopy, STEM-EDS.