PURPOSE: To facilitate transportation and handling, and execute foundation work at a low cost by placing approximately bowl like semi-spherical capsules to be a foundation mold at the required place, and pouring concrete into these capsules and hardening it.

CONSTITUTION: A place to install a foundation is dug deep, and pebbles 4 are placed therein, medium-size stones 3 are placed thereon, and large stones 2 are further placed thereon. Approximately bowl like semi-spherical capsules 7 made of material such as plastic so as to be a foundation mold are placed in the required place to be the foundation. Concrete is poured into the semi- spherical capsules 7 and hardened. Stones are then disposed in gaps between the capsules 7 in such a way as to grip the capsules 7, and the semi-spherical capsules are built into the foundation as they are without being removed. The foundation mold formed of light plastic, other iron plates, or the like is thereby transported to a construction site, and concrete is poured therein at the construction site, so that transportation and handling are facilitated, and foundation work is executed at a low cost.