Abstract: A checkbook folder of integral three-ply construction includes a transverse hinge separating front and back cover panels. The folder is formed by an outer, transparent, rectangular sheet and two smaller, rectangular, inner sheets of synthetic plastic material each being superimposed in edge-to-edge relation with opposite edge portions of the outer sheet and the sheets are bonded together along their peripheral edges. Each cover panel includes a pocket having an opening facing toward the hinge of the folder. An opaque, unitary fibrous insert, imprinted on at least its outer surface, is disposed within the pockets and includes a fold line which corresponds to the transverse hinge.