PURPOSE: A support structure is provided to reduce the number of workers and omit needless preparation works for the fixing work for plates for forms. CONSTITUTION: A support structure comprises a support body(100), and a pair of side plates(200). The support body comprises a plate holder(150), a pedestal, and a length adjusting unit. The plate holder is contacted with woods for supporting. The pedestal is contacted with ground. The pair of side plates is protruded to the outside of the plate holder and supports the woods for supporting.
