Abstract: The present invention relates to a window and more particularly, to a window incorporating means for effecting pivotal movement of the window panel out of the plane in which the panel is slidable so as to facilitate cleaning of both sides of the window panel. The window includes a top rail guide member 13, a rotatable panel 14, and a bottom rail guide member 15, at least one of the guide members being moveable with the window panel in a direction other than one which is slidable. The invention also includes a lifting mechanism adapted to vertically displace the rotatable panel 14 in order to disengage the complementary engaging members 27, 29 connecting the panel and bottom rail guide member together and allow the rotatable panel 14 to rotate.