Abstract: A folding sofa bed frame having head, intermediate and foot bed sections pivotally connected end-to-end and supported and constrained by a linkage arrangement to move in a predetermined pattern between a folded position and a horizontally extended position. A link supports the head and main intermediate sections at their pivotal connection and an actuating link controls movement of the head section, the head section being braced in a horizontal disposition in the extended position by the superposed abutment of the support link by the actuating link. To facilitate shipping, the head section is partially foldable and pivotable independently of the linkage arrangement and the other bed sections to permit folding thereof between the main intermediate and foot sections during folding movement of the frame from its extended to its folded position.