NOVELTY - A carbon material comprises a carbon mesoporous dendrite component having three-dimensional structure where rod-or ring-shaped, carbon-containing components are linked in branched state, and has pore diameter of 1-20 nm and cumulative pore volume of 0.2-1.5 cm3/g as determined by analyzing nitrogen adsorption isotherm by Dollimore-Heal method. The carbon material exhibits a peak corresponding to diffracted ray assignable to (002) plane of graphite at diffraction angle (2 theta ) of 20-30 degrees and peak having half width of 0.1-1 degrees at 25.5-26.5 degrees , based on powder X-ray diffraction spectrum.    USE - Carbon material is used as catalyst carrier for platinum catalyst for polymer electrolyte fuel cell. Can also be used as activated carbon electrode and air electrode for lithium air secondary battery and electrical double-layer capacitor.    ADVANTAGE - The carbon material has high chemical stability, electrical conductivity and porosity, and excellent durability even used under severe conditions, and exhibits excellent diffusion of reaction raw material and reaction product, when used as catalyst carrier. The fuel cell containing the platinum catalyst using the carbon material has excellent durability and is economical.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of carbon material. The solution containing a metal or a metal salt is prepared. Dendritic carbon nanostructure where rod-or ring-shaped, carbon-containing components are linked in a branched state is formed by blowing acetylene gas while applying ultrasonic wave with respect to the solution. The dendritic carbon nanostructure is heated at 60-80 degrees C and metal of the metal acetylide is segregated, to obtain metal-containing dendritic carbon nanostructure. The metal-containing dendritic carbon nanostructure is heated at 160-200 degrees C, and the metal is ejected, such that several ejection ports are existed in or on surface. Then, obtained dendritic carbon mesoporous structure is placed under pressure-reduced atmosphere or inert gas atmosphere, and heat-processed at 1600-2200 degrees C for 0.5-4 hours, to obtain carbon material.