Provided is a porous carbon material composite formed of a porous carbon material and a functional material and equipped with high functionality. A porous carbon material composite is formed of (A) a porous carbon material obtainable from a plant-derived material having a silicon (Si) content of 5 wt% or higher as a raw material, said porous carbon material having a silicon (Si) content of 1 wt% or lower, and (B) a functional material adhered on the porous carbon material, and has a specific surface area of 10 m 2 /g or greater as determined by the nitrogen BET method and a pore volume of 0.1 cm 3 /g or greater as determined by the BJH method and MP method.
