NOVELTY - A composite component has composite particles containing metal oxide particles and polycrystal-type particles having zeolite-like imidazolate structure. Imidazolate ligand in zeolite-like imidazolate structure is imidazole optionally having substituent chosen from 1-3 substituents containing 1-6C alkyl group, halogen, and nitro group. The adjacent substituents at fourth and fifth positions optionally form a group or 5 or 6 membered optionally substituted aromatic carbocyclic rings or aromatic heterocyclic ring.    USE - Composite component is used for adsorbing agent for adsorbing gas e.g. nitrogen gas, dye e.g. rhodamine B, and organic solvent, gas storage, gas separation, gas-sensor device, and heterogeneous reaction catalyst (all claimed). Uses include but are not limited to hydrogenation reaction catalyst, photocatalyst, catalyst for Knoevenagel condensation reaction and solid electrolyte for fuel cells.    ADVANTAGE - The composite component has high adsorption capacity with respect to gas and dye, excellent moldability, and is manufactured by an economical and environmentally-friendly process.    DETAILED DESCRIPTION - A composite component has composite particles containing metal oxide particles in the center portion and polycrystal-type particles having zeolite-like imidazolate structure in the outer shell portion of metal oxide particles. Metal contained in the metal oxide particles and zeolite-like imidazolate structure is zinc or cobalt. Imidazolate ligand in the zeolite-like imidazolate structure is imidazole optionally having substituent (a) or its derivative(s). The substituent (a) is 1-3 substituents chosen from 1-6C alkyl group, halogen, and nitro group. The adjacent substituents at fourth and fifth position on the imidazolate ligand, optionally form a group or 5 or 6 membered optionally substituted aromatic carbocyclic rings or aromatic heterocyclic ring of condensed-ring. An INDEPENDENT CLAIM is included for manufacture of composite component, which involves mixing metal oxide, imidazole, or its derivative(s) in the molar ratio of 1:0.1-1:5, and pulverize-mixing the reaction mixture, and heating.