Abstract: A full height partition wall system is characterized by a unitary panel with a vertically movable head panel and a vertically movable foot panel secured thereto and forming a part thereof adapted to be moved upwardly and downwardly, respectively, to secure the panel to and directly against a ceiling and floor, respectively. The system has no posts, but rather a narrow vertical on each end of the panel which has an outwardly directed relatively shallow channel at the top in which is positioned a strut supporting the corresponding end of the head panel. A drive in the form of a small cog is operative vertically to move the strut and thus the head panel, with a spring detent member holding the strut in adjusted position. An adjustable foot is secured to the bottom of each vertical and the foot panel is spring loaded against the bottom of the foot for movement either with the bottom of the foot or movement independently against the spring loading.