Abstract: A demountable partition wall is of studless construction and comprises ceiling and floor runners adapted to receive a pair of wall panels in spaced relation. The ceiling and floor runners include leg portions which frictionally receive the wall panels to provide a stable and sound deadening construction at the mounting ends of the panels. A stabilizing and sound dampening pad assembly is preferably located in the vertically intermediate regions of the wall. Doors and window units can be located as desired along the partition wall, with the window and door frames being adaptable to the ceiling and floor runners. The floor runner can be spaced above the floor or supporting surface by nails or the like thereby permitting the wall to be installed over carpeting without damaging the same.