Abstract: A vertically extensible self-storing partition panel includes a base panel having a lower portion shaped for freestanding support on a floor surface, and an upper portion with two vertically oriented support sleeves and a storage cavity therebetween. An inverted U-shape extender frame has opposite legs closely received in the support sleeves of the base panel, and permits shifting the extender frame between an extended position above the base panel, and a retracted position within the storage cavity of the base panel. When the extender frame is extended, a retainer holds the same in place, and at least one cover panel covers the open interior of the extender frame.