PURPOSE: To make the title board disposable or polutionless.
CONSTITUTION: Gluten (glue) as a natural protein contained in grain and an alcohol-based solvent are kneaded with a sheet of paper; after that, this kneaded substance is heated, compressed and molded to form a board 1. A conductor circuit is formed at least on one main plane of the board. Electronic components such a resistances, capacitors, IC's, flyback transformers and the like are mounted. A board 10 for electric circuit use is constituted. Thereby, the board is dissolved easily in microorganisms and water, and the environment can be conserved even when the board is thrown away.