Abstract: A formwork forming unit for use in forming a concrete mold serving as a foundation of a building includes a frame-shaped form panel disposed to define a placing space for concrete and a bar-shaped separator. The form panel includes a plurality of first reinforcing beams and a plurality of second reinforcing beams each of which has a smaller diameter than each first beam and formed into a shape of a frame. The form panel further includes a meshed member fixed thereto so as to cover its inside. The separator is attached to the oppositely disposed form panels so as to bridge the form panels when a plurality of the form panels are disposed to define the placing space for the concrete. The separator has both ends folded so as to be formed into hook portions respectively. The hook portions are engaged with the first beams of the oppositely disposed form panels and crimped such that the separator is fixed to the form panels.