The present invention relates to a composite panel comprising: a surface-material layer; a substrate layer formed on the surface-material layer; and a profile which has the shape of a polygonal frame, receives the surface-material layer on the inside, is formed with a slot-in projection on at least one side and is formed with a slot-in recess on at least one side, and relates to a production method for the composite panel. The present invention can provide a composite material which entails a straightforward construction method and which can maintain a high degree of thermal conductivity and can minimize level differences in the constructed product surface, and provide a production method for the composite panel.