Abstract: Disclosed is an electric double layer capacitor that comprises: a polarizable electrode containing a carbon material having graphite-like microcrystalline carbon; and an electrolyte containing a spiro compound represented by the general formula (where A represents a spiro atom having an sp3 hybrid orbital, Z1 and Z2 each represent a group of atoms forming a saturated ring or unsaturated ring in which the number of ring atoms including A is four or more, and X? represents a counter-anion). According to the present invention, an electric field activation type electric double layer capacitor can be obtained that simultaneously achieves improved volumetric capacitance density, improved resistance, and improved withstand voltage.