To remarkably reduce the types of works necessary for work execution by compactly unitizing a form necessary when executing the work for the wall of a building of reinforced concrete and providing the form itself with a specific design.

A form unit paired with reinforcements and joint metal fittings 4 is stacked on a concrete plate material formed by flowing concrete into a form. Because the concrete plate material 6 is formed after the form, a specific design can be given to the finish of the exterior and interior of the form unit. This form unit with a specific design reduces the work process of a concrete building, so that it reduces the work period and the work cost.