Abstract: A horizontal pivot window construction. The window includes a window frame having a sill, a head, and a pair of upright jambs which interconnect the ends of the sill with the ends of the head. The window sash is mounted within the frame and the sash includes upper and lower rails and upright stiles which interconnect the opposite ends of the upper and lower rails. Means are provided for supporting the window sash within the window frame for movement of the sash between a closed and locked position and an open and unlocked position. The supporting means includes means for pivotally mounting the sash within the frame for movement about a substantially horizontal axis so as to make the normal exterior side of the window accessible from the interior of the room in which the window is located. The supporting means also includes a member for vertically moving the sash between an upper position and a lower position when the stiles and the jambs are substantially coextensive with each other.