In a capacitor 10, a first electrode 21, a dielectric layer 23, a solid electrolytic layer 50 and a second electrode 31 are provided. In a manufacturing process, the dielectric layer 23 and a first solid electrolytic layer 24 formed by a chemical polymerization film are provided on the first electrode 21 side, while a second solid electrolytic layer 32 formed by an electrolytic polymerization film is provided on the second electrode 31 side. Then, the solid electrolytic layers are bonded to each other.