To provide a formwork structure and a formwork construction method, capable of efficiently performing formwork detaching work in a short time even when a large-sized formwork is used, in the formwork structure and the formwork construction method for placing concrete.

In the formwork structure, a pair of formworks are separated by a separator and arranged facing each other, and one of the pair of formworks comprises a combination of a main formwork and a sub formwork. The main formwork includes a planar part having a plurality of hole parts extending in the longitudinal direction, and a plurality of support members fixed to the outer surface side of the planar part. The support member extends in the lateral direction so as to cross the hole parts on the outer surface side of the planar part. The sub formwork comprises the plurality of sub formworks respectively fitted to the plurality of hole parts.