The invention is intended to reduce expansion proportion of electric
double layer capacitors by combining nonporous carbonaceous electrodes
produced by a specific method with an electrolyte of a specific
structure. Provided is an electric double layer capacitor comprising
nonporous carbonaceous electrodes soaked in an organic electrolytic
solution, wherein the organic electrolytic solution contains a
pyrrolidinium compound salt as a solute, and wherein the carbonaceous
electrodes are electrodes obtained by the method comprising a step of
obtaining a carbon powder by prebaking a needle coke green powder under
an inert atmosphere, baking the prebaked needle coke powder in the
presence of alkali hydroxide under an inert atmosphere, and removing the
alkali hydroxide; and a step of shaping the carbon powder.