A lithium ion capacitor is provided with a positive electrode made of a material capable of reversibly carrying lithium ion and/or anion, a negative electrode made of a material capable of reversibly carrying lithium ion and an electrolytic solution made of a non-protonic organic solvent electrolytic solution of a lithium salt. (a) A negative electrode active material is non-graphitizable carbon that has a ratio of number of hydrogen atoms to number of carbon atoms of zero or more and less than 0.05. (b) Lithium ion is doped in advance to a negative electrode and/or positive electrode so that a negative electrode potential when a cell is discharged to a voltage one half a charging voltage of the cell may be 0.1.5 V or less to a metal lithium potential.