TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The nanoparticle-containing composite porous component further contains an ordered ball-shaped organic aggregate coated with nanoparticles. Nanoparticles are supported by chemical bonding with solid skeleton portion through the organic aggregate. A nanoparticle precursor is formed and converted into nanoparticles. Nanoparticles are formed in the internal portions of the organic aggregate contained in the porous component. The organic aggregate is decomposed by heating and removed. A solution containing composite component particles which contain organic aggregate is prepared. The porous component having a solid skeleton portion and pore is prepared. The porous component is immersed into the solution so that composite component particles are dispersed at the porous component.Preferred Portion: The solid skeleton portion of the porous component has a network structure.Preferred Component: The porous component is a dry gel of inorganic oxide or a carbon porous component. The porous component is formed using carbon precursor by sol gel process, drying and carbonizing.    TECHNOLOGY FOCUS - BIOLOGY - Preferred Aggregate: The ball-shaped organic aggregate is a spherical shell shaped protein which is ferritin or tree like polymer such as dendrimer. EXAMPLE - Tetramethoxysilane, ethanol, and ammonia aqueous solution (0.1 N) as raw material solution of silica and ferritin (0.1 mmol/L) were mixed. Iron oxide was formed at the core of ferritin. The obtained mixture was introduced into a container, and silica gel was gelatinized and solidified at room temperature. The gel was dried and nanoparticle-containing porous component (A) containing dry silica gel and ferritin was obtained. The nanoparticle-containing porous component was dried at pressure of 12 MPa and at 50degreesC using carbon dioxide. Nanoparticle-containing porous component was heated at 500degreesC for 1 hour. Organic aggregate of ferritin was removed and nanoparticle-containing porous component (B) containing iron oxide was obtained. The obtained nanoparticle-containing porous component was heated at 700degreesC for 1 hour to obtain nanoparticle-containing porous component (C).