A porous carbon material is provided. The porous carbon material having a value of specific surface area of at least 10 m2/g as measured by a nitrogen BET method, a pore volume of at least 0.1 cm3/g as measured by a BJH method and a MP method, and a R value of 1.5 or greater, wherein the R value is expressed as R=B/A, wherein A is an intensity at an intersection between a baseline of a diffraction peak of a (002) plane as obtained based on powdery X-ray diffractometry of the porous carbon material and a perpendicular line downwardly drawn from the diffraction peak of the (002) plane, and wherein B is an intensity of the diffraction peak of the (002) plane.