A solid electrolytic capacity has an anode foil 2 having dielectric oxide layer 16 formed on surface thereof, a cathode foil 4 having whiskers 18 that are formed on surface thereof and hold carbide grains 17, a separator paper 6 and solid electrolytic layers 12 formed of a conducting polymer. The anode foil 2 and the cathode foil 4 were rolled together across the separator paper 6. The solid electrolytic layers 12 are formed between the anode foil 2 and the cathode foil 4. Thickness of a layer where the whiskers 18 hold the carbide grains 17 is 1 m to 5 m. A method of manufacturing a solid electrolytic capacitor having steps of generating whiskers on surface of a cathode foil after coating carbide grains on the surface of the cathode foil and drying the carbide grains, rolling the cathode foil and an anode foil having dielectric oxide layer formed on surface thereof across a separator, impregnating polymerizable monomers and an oxidizing reagent into the separator, polymerizing the polymerizable monomers and forming solid electrolyte layers between the cathode foil and the anode foil.

 
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