Abstract: A modular piece of furniture such as a room divider, with a compartmented skeletal structure forming shelves and cabinets, has its horizontal and vertical wall members interconnected by moldings extending along orthogonally adjoining edges thereof with ribs fitting into longitudinal grooves of these edges. Other profiles, of generally trapezoidal cross-section, have exposed longitudinal slots accommodating inserts which carry hinge elements for the connection of swing doors to certain of these wall members. Similar profiles along the free edges of door leaves are fitted with bumper or sealing strips.