To form the surface of a concrete structure so that it has a feeling of consistency in all aspects and does not impair natural view.

This form panel includes a concrete panel base 11 having a predetermined area large enough for the panel to be used as the form of placed concrete A and sufficient mechanical strength to withstand the pressure of placement and integrated with the placed concrete A having mounting bolts 15 buried therein, and a wood panel 12 comprising a plurality of pieces of timber 12a connected integrally with one another by passing connecting bolts 13 therethrough in a direction perpendicular to the longitudinal direction of the timber 12a, the pieces of timber being joined to one side of the panel base 11 via the mounting bolts 15 buried in the panel base 11. Thus, even just after construction work the surface of the wood panel 12 has a color present in nature, and even if the surface of the wood panel 12 is grayed and discolored as the result of aged deterioration, it maintains the color present in nature and harmonizes well with the environment.