NOVELTY - An organic compound is adsorbed on a porous dicarboxylic acid metal complex containing an organic ligand, specific dicarboxylic acid(s) and bivalent metal(s). The obtained material is press-molded, to obtain molded metal complex. The ligand is capable of carrying out bidentate coordination, and has pKa of 4 or more. The bivalent metal is copper, rhodium, chromium, molybdenum, palladium, zinc and/or tungsten.    USE - For manufacturing molded metal complex for gas adsorption material, gas storage apparatus for storing gas, gaseous fuel automobile, adsorption type gas storage tank and LNG storage apparatus (all claimed).    ADVANTAGE - The molded metal complex with high specific surface area, high pore volume, excellent gas adsorption ability per volume, storage ability and repeating property, is obtained economically and efficiently.    DETAILED DESCRIPTION - An organic compound is adsorbed on a porous dicarboxylic acid metal complex containing an organic ligand, dicarboxylic acid(s) and bivalent metal(s). The obtained material is press-molded, to obtain molded metal complex. The ligand is capable of carrying out bidentate coordination, and has pKa of 4 or more. The bivalent metal is copper, rhodium, chromium, molybdenum, palladium, zinc and/or tungsten. The dicarboxylic acid has formula, HOOC-R-COOH.    R = arylene optionally having substituent, alkylene, alkenylene or alkynylene.    INDEPENDENT CLAIMS are included for the following:    (1) molded metal complex;    (2) gas adsorption material (8) having the molded metal complex;    (3) gas storage method which involves adsorbing and storing methane and/or carbon dioxide, or gas having methane as main component on pressurization condition in the gas adsorption material;    (4) gas storage apparatus having retainable retention mechanism for gas in entrance (5b) and exit (5a) of storage material, and pressure vessel (4) carrying out temperature maintenance and containing the gas adsorption material;    (5) gaseous fuel automobile (2) having the gas storage apparatus and internal combustion engine (3) obtaining a driving force from the methane-containing gas supplied from the storage apparatus;    (6) adsorption type gas storage tank containing the gas adsorption material; and    (7) liquefied natural gas (LNG) storage apparatus having LNG tank and adsorption type filling tank arranged in a row via a safety valve. When the pressure of LNG tank becomes higher than predetermined value, adsorption storage of evaporative emission of constant rate is carried out in the adsorption type storage tank containing the gas adsorption material.    DESCRIPTION OF DRAWING(S) - The figure shows the schematic diagram of gaseous fuel automobile.    fuel tank (1)    gaseous fuel automobile (2)    internal combustion engine (3)    pressure vessel (4)    exit (5a)    entrance (5b)    gas adsorption material (8)